AD 2014-11-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada Corp | Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines |
Unsafe Condition
In-service events involving the perforation of engine cases as a result of the liberation of power turbine (PT) blades and the fracture/displacement of the PT containment ring.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a reinforcement liner to the power turbine (PT) containment ring and, for certain PT containment rings, add scallops. Modify the existing PT containment ring within 48 months after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 48 months after the effective date of this AD.
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Affected Aircraft
Pratt & Whitney Canada Corp. turboprop engines: all model PT6A-20, PT6A-20A, PT6A-20B, PT6A-25, PT6A-28, PT6A-34B, PT6A-36, and PT6A-135 engines; specific serial number ranges for models PT6A-11, PT6A-11AG, PT6A-15AG, PT6A-21, PT6A-25A, PT6A-25C, PT6A-27, PT6A-34, PT6A-34AG, PT6A-110, PT6A-112, PT6A-114, and PT6A-135A engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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