AD 75-13-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | TF33-P-7 | PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines |
| engine | Pratt & Whitney Division | TF33-P-7A | PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines |
Unsafe Condition
The thirteenth, fourteenth, fifteenth, and sixteenth stage compressor disks (P/N 657913, 657914, 657915, 657916) may exceed their revised life limits, leading to potential disk failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service the specified compressor disks prior to exceeding the revised life limit of 8,500 cycles. The previous life limit of 15,000 cycles has been reduced.
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Compliance Time
prior to exceeding the revised life limit listed below
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Affected Aircraft
Pratt & Whitney Aircraft TF33-P-7 and TF33-P-7A engines containing thirteenth stage compressor disk P/N 657913, fourteenth stage compressor disk P/N 657914, fifteenth stage compressor disk P/N 657915, and sixteenth stage compressor disk P/N 657916.
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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