http://www.news.admin.ch Emergency Airworthiness Directives (EAD) it 2013-05-26 2013-05-26 News Service Bund http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-04-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-03-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-03-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-03-11 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-03-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-02-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-02-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2013-02-14 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-12-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-12-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-12-05 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-11-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-10-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-10-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-10-19 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-10-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-10-05 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-09-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-09-14 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/experten/luftfahrzeuge/lta/03241/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-09-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-07-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-06-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-06-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-06-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-05-31 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-05-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-05-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-04-05 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-03-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-03-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-03-12 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2012-01-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-23 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-14 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-02 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-12-01 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-11-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-11-24 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-11-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-10-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-10-10 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-10-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-09-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-09-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-09-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-08-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-08-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-08-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-07-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-07-08 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-07-08 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-07-07 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-07-01 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-06-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-06-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-05-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-05-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-05-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-04-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-04-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-03-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-03-24 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-03-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-03-07 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-02-28 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-02-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-02-10 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2011-01-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-12-01 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-11-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-10-25 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-10-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-10-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-10-11 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-09-23 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-09-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-08-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-08-23 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-08-18 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-08-02 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-07-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-07-06 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-06-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-06-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-06-11 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-06-04 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-05-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-05-20 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-05-07 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-04-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-04-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-04-01 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-03-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-03-24 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-03-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-03-12 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-02-19 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-02-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-01-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-01-20 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-01-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2010-01-04 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-12-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-12-21 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-19 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-10 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-05 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-11-03 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-28 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-27 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-23 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-10-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-09-22 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-09-04 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-09-03 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-08-24 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-08-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-08-12 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-31 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-30 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-29 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-20 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-07-10 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-06-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-06-15 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-06-11 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-06-02 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-05-08 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA. This safety relevant technical information is addressed to operators and maintenance organizations of the affected aircraft only and gives specific guidelines. 2009-05-01 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-04-17 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-04-14 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-04-03 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-03-26 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-03-20 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-03-16 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=it A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-03-13 Ufficio federale dell'aviazione civile http://www.bazl.admin.ch/fachleute/lufttechnik/entwicklung/00656/00664/index.html?lang=en A new Emergency Airworthiness Directive has been published by FOCA and may be of interest to you. 2009-02-27 Ufficio federale dell'aviazione civile