AD 70-02-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT8D-1 | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-11 | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-15 | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-15A | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-17 | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-17A | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-17AR | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-17R | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-1A | PRATT & WHITNEY Model JT8D Series Engines |
| engine | Pratt & Whitney Division | JT8D-1B | PRATT & WHITNEY Model JT8D Series Engines |
Unsafe Condition
Sixth stage compressor rotor disc failures as a result of abnormal processing of the edge radius in the base of the blade slots.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the suspect sixth stage compressor rotor disc with a new, used, or reworked disc approved by the Chief, Engineering & Manufacturing Branch, Eastern Region, New York. Compliance time adjustments may be made upon submission of substantiating data through an FAA Maintenance Inspector.
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Compliance Time
For engines with 1700 hours' or more in service since new: within the next 600 hours in service after the effective date of this AD. For engines with 1700 hours' or less in service since new: prior to accumulating 2300 hours' in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Model JT8D-1, JT8D-11, JT8D-15, JT8D-15A, JT8D-17, JT8D-17A, JT8D-17AR, JT8D-17R, JT8D-1A, and other JT8D series engines with specific sixth stage compressor rotor disc serial numbers listed in the AD.
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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