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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Fokker F100 (F28 Mk 100) Series Aeroplanes
AD/F100/7 Vertical Stabiliser 4/99
F.28 Mk.0100 aircraft, serial numbers 11244, 11245, 11250 through 11256 and 11268 through 11273.
Inspect the vertical stabiliser and install three reinforcement doublers in accordance with Fokker Service Bulletin (SB) F100-55-011 dated 1 October 1991.
RLD BLA 91-117 refers.
Unless previously accomplished, before accumulating 6,500 flight cycles since new.
This Airworthiness Directive becomes effective on 22 April 1999.
Fatigue tests on the F.28 Mk.0100 have revealed cracks in the skin of the vertical stabiliser at rib 5.0 near intermediate spars I and II, and in the underlying structure. This AD requires a modification to prevent cracks and to improve the fatigue life of the vertical stabiliser.