AD 2012-26-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada Corp | Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines |
Unsafe Condition
Reports of two propeller shafts found cracked at time of inspection during maintenance.
Required Actions
Perform initial visual inspection or initial ultrasonic inspection for cracks, and repeat at specified intervals. If a crack is found, remove the propeller shaft from service before the next flight. Remove affected propeller shafts from service as mandatory terminating action to the repetitive inspections.
Compliance Time
Within 50 flight hours after the initial inspection, and thereafter within every 10 flight hours, until the propeller shaft is removed from service.
Affected Aircraft
All Pratt & Whitney Canada Corp. (P&WC) PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126A, PW127, PW127E, PW127F, PW127G, and PW127M turboprop engines, with the serial number (S/N) propeller shafts listed in P&WC Alert Service Bulletin (ASB) No. PW100-72-A21813, Revision 3, dated March 21, 2012, ASB No. PW100-72-A21802, Revision 4, dated March 16, 2012, and ASB No. PW100-72-A21798, Revision 5, dated March 20, 2012.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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