AD 87-23-05 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-7R4D | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D1 | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E1 | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E4 | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4G2 | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4H1 | PRATT & WHITNEY Models JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 Series Engines |
Unsafe Condition
Fan blade fragment penetration of the fan case assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify and reidentify engines by installing specified shields and ring segments per Pratt & Whitney Service Bulletins, and reidentify modified assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to December 31, 1990
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-7R4D, -7R4D1, -7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 series turbofan 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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