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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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