Engine Controls — Propeller Governor — Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected engines must replace the identified propeller governors with serviceable parts within 40 months from 15 December 2022. Additionally, no affected propeller governors may be installed or reinstalled on any engine from the effective date of the directive. Compliance must follow the instructions provided in the GE Aviation Czech Alert Service Bulletin.
Summary
EASA Airworthiness Directive 2022-0234 is an official regulatory document addressing the replacement of propeller governors on GE Aviation Czech M601, H75, H80, and H85 engines installed on single-engine aeroplanes such as the Air Tractor AT-400 and AT-500 series, Allied Ag Cat G-164 series, and Thrush Aircraft 510G and S-2R series. The directive mandates replacing certain propeller governors with updated serviceable parts to ensure continued airworthiness and safety.
What changed
This new Airworthiness Directive introduces a mandatory replacement of propeller governors with part numbers P-W11-1 or P-W11-2 due to reported needle bearing failures causing oil contamination. It prohibits the installation or reinstallation of these affected parts and requires operators to replace them with serviceable parts P-W11-4 or P-W11-5 within a specified timeframe.
Why it matters
This directive is critical for aviation professionals because the affected propeller governors have experienced needle bearing failures that could lead to loss of propeller control oil pressure, engine failure, and potential damage to the aircraft. Compliance ensures the safety and reliability of the affected engines, preventing in-flight incidents and maintaining regulatory adherence.
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