Engine — First-Stage Power Turbine (PT1) Blade Failure
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Pratt & Whitney Canada PT6A engines must inspect for suspect PT1 blades within 100 flight hours or six months from 2024-09-30, whichever occurs first. If suspect blades are found, they must be replaced within the same timeframe. Additionally, no suspect PT1 blades may be installed on any affected engine from the effective date onward.
Summary
The Canadian Airworthiness Directive CF-2024-33 addresses a failure risk in the first-stage power turbine (PT1) blades of Pratt & Whitney Canada PT6A series engines, including models PT6A-64 through PT6A-67T. This directive mandates inspection and replacement of suspect PT1 blades identified by specific part and heat codes to prevent potential engine power loss or in-flight shutdown. The directive applies to all serial numbers of the affected engines and aims to ensure continued airworthiness and flight safety.
What changed
CF-2024-33 introduces a new mandatory one-time inspection and replacement requirement for suspect PT1 blades made from a specific raw material linked to recent blade failures. It also prohibits the installation of these suspect blades on all affected engines from the effective date. The directive references P&WC Alert Service Bulletin PT6A-72-A14575 Revision 2 as the compliance method.
Why it matters
This directive is critical for operators and maintenance organizations to prevent engine power loss or in-flight shutdown caused by PT1 blade failure. Compliance ensures aircraft safety and regulatory adherence, avoiding potential operational disruptions and safety incidents. Maintenance teams must identify and replace suspect blades promptly to maintain engine reliability and airworthiness.
More for Pratt & Whitney Canada PT6A-67
All 5- EASA AD CF-2024-05Engine — Second-Stage Power Turbine (PT2) Blade FailureFeb 15, 2024
- EASA AD CF-2022-26Engine Bleed Air — Bleed-Off Valve Failure to CloseMay 18, 2022
- EASA AD CF-2021-37Engine Bleed Air – Bleed-Off Valve (BOV) Failure to CloseNov 9, 2021
- EASA AD CF-2021-20SUPERSEDED BY TCCA AD CF-2021-37May 19, 2021
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