AD 70-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | Military R-985 Series | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. A | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. B-4 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. B-5 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. SB | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. SB-2 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. SB-3 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. T1B | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. T1B2 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. T1B3 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. T3A | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. TB | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
| engine | Pratt & Whitney Division | Wasp Jr. TB-2 | PRATT & WHITNEY R-985 and Wasp Jr. Type Engines |
Unsafe Condition
Failure of the gerotor pump drive pin or plugging of the fuel injector filter P/N 580436 could cause engine power loss.
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Required Actions
Inspect and clean the fuel injector filter P/N 580436 within 100 hours time in service after the effective date and every 100 hours thereafter. Overhaul fuel injector P/N 580047 before accumulating 600 hours time in service; injectors with over 550 hours as of the effective date must be overhauled within 50 hours. Submit substantiating data through an FAA Maintenance Inspector to adjust inspection intervals.
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Compliance Time
Within the next 100 hours time in service after the effective date and thereafter at intervals of 100 hours time in service for inspections. Overhaul prior to 600 hours time in service or within 50 hours if over 550 hours on effective date.
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Affected Aircraft
Pratt & Whitney R-985 and Wasp Jr. type engines altered with Supplemental Type Certificate No. SE1-391 incorporating Simmonds Precision Part No. 580047.
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Federal Register Abstract
Gerotor Pump Drive Pin/Fuel Injector Filter
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-10-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-10-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY R-985 and Wasp Jr. Type Engines Subject: Gerotor Pump Drive Pin/Fuel Injector Filter Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/09/1970 Make: Pratt & Whitney Division Model: Military R-985 Series | Wasp Jr. A | Wasp Jr. B-4 | Wasp Jr. B-5 | Wasp Jr. SB | Wasp Jr. SB-2 | Was...Show more Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-10-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-984 AD NUMBER: 70-10-02 SUBJECT HEADING: PRATT & WHITNEY R-985 and Wasp Jr. Type Engines ACTION: SUMMARY: DATES: Effective June 9, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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, Engineering and Manufacturing Branch, FAA Eastern Region may adjust the repetitive inspection intervals specified in this AD. This amendment is effective June 9, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-10-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-10-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY R-985 and Wasp Jr. Type Engines Subject: Gerotor Pump Drive Pin/Fuel Injector Filter Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/09/1970 Make: Pratt & Whitney Division Model: Military R-985 Series | Wasp Jr. A | Wasp Jr. B-4 | Wasp Jr. B-5 | Wasp Jr. SB | Wasp Jr. SB-2 | Was...Show more Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-10-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-984 AD NUMBER: 70-10-02 SUBJECT HEADING: PRATT & WHITNEY R-985 and Wasp Jr. Type Engines ACTION: SUMMARY: DATES: Effective June 9, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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, Engineering and Manufacturing Branch, FAA Eastern Region may adjust the repetitive inspection intervals specified in this AD. This amendment is effective June 9, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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