69-23-06 UNITED AIRCRAFT OF CANADA, LIMITED: Amdt. 39-874. Applies to PT6 model series engines equipped with Pesco Model 024-800 fuel pumps as follows:
PT6A-6, -6A, -6B, PT6B-9 all engines
PT6A-20 prior to S/N PC-E22480
PT6A-27 prior to S/N PC-E40311
PT6A-28 prior to S/N PC-E50054 except 50051, 50052
Compliance within 50 hours after the effective date of this Airworthiness Directive unless already accomplished.
To prevent disengagement of the fuel pump input coupling from the engine gearbox, remove retaining ring, Pesco P/N 99-4660 and install new snap ring Pesco P/N 99-4906. United Aircraft of Canada Ltd. Service Bulletin No. 174 pertains to this subject.
This amendment is effective November 15, 1969.