AD 91-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | JT15D-4B | PRATT & WHITNEY CANADA, INC. Model JT15D-4B Engines |
Unsafe Condition
Rupture of the gas generator case (GGC) which could result in an inflight shutdown, aborted takeoff, and/or damage to the aircraft.
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Required Actions
Perform a borescope inspection of GGC Part Number 3106469-01 within 10 days after the effective date, paying attention to spot welds. Repetitive inspections must be done every 150 engine operating hours or 150 cycles since last inspection, whichever comes first. Replace cracked GGCs with serviceable parts (P/N 3109069-01, 3110464-01, or 3114407-01) during next engine overhaul.
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Compliance Time
within 10 days after the effective date of this AD, unless already accomplished within the previous 150 engine operating hours or 150 cycles in service, whichever is the shorter interval
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Affected Aircraft
Pratt & Whitney Canada Corp. Model JT15D-4B engines with serial numbers PC-E 102047 to PC-E 102050 inclusive, PC-E 102053 to PC-E 102066 inclusive, PC-E 102069, PC-E 102070, PC-E 102073, PC-E 102082, and PC-E 102089.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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