AD 70-10-02

70-10-02 PRATT & WHITNEY: Amdt. 39-984. Applies to all Pratt & Whitney Aircraft R-985 and Wasp Jr. type engines altered in accordance with Supplemental Type Certificate No. SE1-391 incorporating Simmonds Precision Part No. 580047, fuel injector. Compliance required as indicated. To prevent engine power loss as the result of failure of the gerotor pump drive pin or the plugging of the fuel injector filter, accomplish the following: (a) Within the next 100 hours time in service after the effective date of this AD and thereafter at intervals of 100 hours time in service inspect and clean the fuel injector filter P/N 580436. (b) Overhaul the fuel injector P/N 580047 prior to the accumulation of 600 hours time in service. For injectors with more than 550 hours time in service on the effective date of this AD overhaul the injector within the next 50 hours time in service. (c) Upon submission of substantiating data through an FAA Maintenance Inspector, the Chief, Engineeringand Manufacturing Branch, FAA Eastern Region may adjust the repetitive inspection intervals specified in this AD. This amendment is effective June 9, 1970.