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/F50/47 Nose Landing Gear Retraction Mechanism 10/91
Applicability: Serial number 20103 to 20108 inclusive, and 20110 to 20131 inclusive. Requirement: Action in accordance with the Technical Requirements of RLD AD 90-057, dated
23 May 1990.
Note: Fokker Service Bulletin F50-32-004, dated 17 April 1990 refers.
Compliance: Prior to exceeding 12 000 pressurisation cycles.
Background: During full-scale fatigue testing, cracks were found near a lightening hole in the nose landing gear link assembly. To improve the fatigue life of this component, this AD calls for the replacement of the current retraction link assembly with a reinforced unit.