# AD 70-10-02: Gerotor Pump Drive Pin/Fuel Injector Filter

- Type: Airworthiness directive
- Status: Current
- Products: Pratt & Whitney R-985 engine and ATI fuel injection (Staggerwing Museum Foundation STC SE1-391)
- Effective: June 9, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-984
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E929DF298FF73FC48625682C00561736.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-10-02

## The airworthiness directive

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.

## Affected data sheets (5) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-123](https://openairdocs.org/tcds/E-123): Pratt & Whitney Division; names 7 of 7 models: Wasp Jr. T1B3, Wasp Jr. B-4, Wasp Jr. SB-3, Wasp Jr. T1B2, Wasp Jr. SB, Wasp Jr. SB-2, Wasp Jr. B-5
- [TCDS TC 85](https://openairdocs.org/tcds/TC%2085): Pratt & Whitney Division; names 3 of 3 models: Wasp Jr. TB, Wasp Jr. TB-2, Wasp Jr. T3A
- [TCDS ATC 39](https://openairdocs.org/tcds/ATC%2039): Pratt & Whitney Division; names 1 of 1 models: Wasp Jr. A
- [TCDS TC 113](https://openairdocs.org/tcds/TC%20113): Pratt & Whitney Division; names 1 of 1 models: Wasp Jr. T1B
- [TCDS TC 5E-1](https://openairdocs.org/tcds/TC%205E-1): Pratt & Whitney Division; names 1 of 1 models: Military R-985 Series

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

## Related documents

- [STC SE1-391](https://openairdocs.org/stc/SE1-391): Pratt & Whitney R-985 engine and ATI fuel injection.. Staggerwing Museum Foundation Inc., Named in the applicability

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