AD 87-10-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | JT15D-1 | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
| engine | Pratt & Whitney Canada Corp. | JT15D-1A | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
| engine | Pratt & Whitney Canada Corp. | JT15D-1B | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
| engine | Pratt & Whitney Canada Corp. | JT15D-4 | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
| engine | Pratt & Whitney Canada Corp. | JT15D-4B | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
| engine | Pratt & Whitney Canada Corp. | JT15D-4D | PRATT & WHITNEY CANADA Model JT15D-1, -1A, -1B, -4, -4B, and -4D Engines |
Unsafe Condition
Failure of certain fan blades due to machining striations in the root fillet radius area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect fan blade root fillet radius and adjacent airfoil area for surface finish per PWC SB 7257 Rev 2. Remove and replace fan blades with machining striations before further flight. Ferry aircraft under FAR 21.197/199 if needed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 15 calendar days or 25 hours time in service from the AD effective date (July 15, 1988), whichever comes first, and thereafter before installing non-inspected blades.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Canada JT15D-1, -1A, -1B, -4, -4B, and -4D 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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