AD 64-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | Military R-2800 Series | PRATT & WHITNEY Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines |
Unsafe Condition
Exhaust valve failures
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the P/N 44764 exhaust valves with P/N's 50724 or 158175 exhaust valves.
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Compliance Time
within 1,400 hours' time in service after the effective date of this AD
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Affected Aircraft
Pratt & Whitney Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Exhaust Valve
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_64-10-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-10-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Serie...Show more Subject: Exhaust Valve Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Pratt & Whitney Division Model: Military R-2800 Series Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 64-10-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-10-05 SUBJECT HEADING: PRATT & WHITNEY Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-10-05 PRATT & WHITNEY: Amdt. 724 Part 507 Federal Register May 5, 1964. Applies to All Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines. Compliance required within 1,400 hours' time in service after the effective date of this AD. Because of instances of exhaust valve failures, replace the P/N 44764 exhaust valves with P/N's 50724 or 158175 exhaust valves. This directive effective June 5, 1964. Revised September 5, 1964. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_64-10-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-10-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Serie...Show more Subject: Exhaust Valve Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Pratt & Whitney Division Model: Military R-2800 Series 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: 64-10-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-10-05 SUBJECT HEADING: PRATT & WHITNEY Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-10-05 PRATT & WHITNEY: Amdt. 724 Part 507 Federal Register May 5, 1964. Applies to All Models R-2800-21, -27, -31, -43, -51, -51M4, -59, -63, -71, -75, -75M2 and -79 Series Engines. Compliance required within 1,400 hours' time in service after the effective date of this AD. Because of instances of exhaust valve failures, replace the P/N 44764 exhaust valves with P/N's 50724 or 158175 exhaust valves. This directive effective June 5, 1964. Revised September 5, 1964. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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