AD 59-10-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT3C-6 | PRATT & WHITNEY Model Wasp JT3C-6 Engines |
Unsafe Condition
Third-stage turbine blade failures due to use of P/N 271303 blades prior to change J-3 and P/N 371603 blades prior to change C-3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace P/N 271303 blades prior to change J-3 and P/N 371603 blades prior to change C-3 within 300 hours of blade operating time. Blades with P/N 271303 change J-3 or later and P/N 371603 change C-3 or later do not require replacement.
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Compliance Time
within 300 hours of blade operating time
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Affected Aircraft
Pratt & Whitney Model Wasp JT3C-6 Engines prior to serial numbers P630735B (excluding specified ranges) and P630742D (excluding specified serial numbers)
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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