AD 2011-25-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Corp | Airworthiness Directives; Pratt & Whitney Corp. (PW) JT9D-7R4H1 Turbofan Engines |
Unsafe Condition
Reports of cracks in five high-pressure compressor (HPC) shafts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove HPC shafts with part number 808071 from service within 500 cycles-in-service after the effective date if they have more than 4,500 cycles-since-new (CSN). Remove HPC shafts with 4,500 or fewer CSN before exceeding 5,000 CSN. Remove HPC shafts with part number 808070 before exceeding 1,200 CSN. Do not install or reinstall removed HPC shafts or those exceeding the new life limits.
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Compliance Time
Within 500 cycles-in-service after the effective date or at the next shop visit, whichever occurs first, for HPC shafts with more than 4,500 CSN. Before exceeding 5,000 CSN for HPC shafts with 4,500 or fewer CSN. Before exceeding 1,200 CSN for HPC shafts with part number 808070.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Corp. JT9D-7R4H1 turbofan engines with high-pressure compressor (HPC) shafts, part number 808070 or 808071, installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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