Document ID: chunk:federal_register_of_legislation:F2006B09854:body:0
Version: federal_register_of_legislation:F2006B09854
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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/F50/28 Stringer 18 Between Stations 4875 and 5325 13/89

 Applicability: F27 Mark 50 aircraft serial numbers 20103 through 20108 and 20110 through 20123. Requirement:               Action in accordance with Fokker Service Bulletin F50-53-017, dated 30 June 1989.
            Note: RLD BLA 89-077 dated 12 July 1989 refers.

 Compliance: Prior to accumulating 10000 flights.

            Background: During full-scale fatigue testing, cracks were found in the skin, near the intercostal of the toilet wash-water tank. These cracks were found to initiate at the dimpled rivet holes in the skin-to-stringer connection. To improve the fatigue life of this connection, inspection and reinforcement of the affected skin is required.