Document ID: chunk:federal_register_of_legislation:F2006B09847:body:0
Version: federal_register_of_legislation:F2006B09847
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

 Fokker F50 (F27 Mk 50) Series Aeroplanes

AD/F50/21 Forward Fuselage - Stringers and Frame 5775 8/89

 Applicability: Serial numbers 20103 through 20108 and 20110 through 20121.

            Requirement: Reinforce fuselage frame to stringer connection by installing connecting angles in accordance with Fokker Service Bulletin F50-53-004 dated 14 October 1988.

            Note: Netherlands AD 88-81 refers.

 Compliance: Prior to accumulating 10000 flight cycles.

            Background:  Full scale fatigue testing has shown the possibility of cracks occurring on the subject area, due to insufficient frame to stringer connection.