AD 92-01-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | PW118 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW118A | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW120 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW120A | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW121 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW123 | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW124B | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
| engine | Pratt & Whitney Canada Corp. | PW125B | PRATT & WHITNEY CANADA Models PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B Engines |
Unsafe Condition
Seizure of the high pressure rotor and subsequent inability to restart the engine inflight.
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Required Actions
Rework or replace the high pressure turbine front cover, low pressure turbine stator vane assembly, high pressure vane segments, and cooling air nozzle housing assembly in accordance with specified Pratt & Whitney Canada service bulletins. Alternative methods of compliance may be approved by the Engine Certification Office.
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Compliance Time
At the next engine module overhaul, hot section inspection (HSI), or within 36 months from the effective date of this AD, whichever occurs first, unless accomplished previously.
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Affected Aircraft
Pratt & Whitney Canada PW115, PW118, PW118A, PW120, PW120A, PW121, PW123, PW124B, and PW125B engines with specific serial numbers noted in applicable service bulletins, installed in various aircraft models including Aerospatiale ATR-42, ATR-72, British Aerospace ATP, DeHavilland DHC-8, Embraer EMB-120, Canadair CL-215T, and Fokker 50.
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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