AD 2024-04-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada Corp | Airworthiness Directives; Pratt & Whitney Canada Corp. Engines |
Unsafe Condition
There has been a recent in-service report of a PT2 blade failure on a model PT6A-67 engine and two reports of PT2 blade failures during testing at the manufacturer's facility. The PT2 blade failures were contained. The manufacturer is investigating the root cause of the PT2 blade failures, but the preliminary investigation determined that the affected power turbine modules contained PT2 blades with part number 3056693-01, which were newly manufactured from the same raw material. In all cases, the PT2 blades had accumulated less than 25 hours air time since new.
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Required Actions
Remove the suspect blades prior to the next flight and prohibit installation of the suspect blades. These corrective actions are interim actions until the root cause investigation is completed.
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Compliance Time
Before further flight
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Affected Aircraft
Pratt & Whitney Canada Corp. Model PT6A-64, PT6A-66, PT6A-66A, PT6A-66B, PT6A-66D, PT6A-67, PT6A-67A, PT6A-67AF, PT6A-67AG, PT6A-67B, PT6A-67D, PT6A-67F, PT6A-67P, PT6A-67R, PT6A-67RM, PT6A-67T, PT6A-68, PT6A-68D, PT6E-67XP, and PT6E-66XT engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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