Engine — Critical Parts — Replacement
- Published
- Effective
- Deadline
- Replaces
- 2021-0125-E
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of M601E engines with centrifugal compressor case P/N M601-154.61 must replace the critical part before it exceeds 11,000 equivalent flight cycles or within 350 flight hours after 11 May 2021, whichever occurs first. Compliance should follow the instructions in the specified GE Aviation Czech Alert Service Bulletin. Alternative methods of compliance may be approved by EASA upon request.
Summary
EASA Airworthiness Directive 2021-0125R1 is an updated regulatory requirement addressing the replacement of critical parts in GE Aviation Czech M601E engines, specifically those with centrifugal compressor case Part Number M601-154.61. This directive primarily affects aircraft such as the Aircraft Industries L-410 series equipped with these engines. It mandates the replacement of certain critical engine parts to ensure continued airworthiness and prevent engine failure.
What changed
EASA Airworthiness Directive 2021-0125R1 revises the original Emergency AD 2021-0125-E by limiting the applicability to M601E engines with the specified centrifugal compressor case and removing requirements now covered by the Airworthiness Limitations Section (ALS). It updates compliance instructions and removes previously included life limit and installation requirements that have been superseded by other directives.
Why it matters
This directive is crucial for aviation professionals as it addresses errors in life limit calculations for critical engine parts, preventing potential engine failures that could compromise flight safety. Operators and maintenance organizations must ensure compliance to avoid operating engines beyond safe life limits, thereby maintaining regulatory compliance and safeguarding aircraft control.
More for Ge Aviation Czech M601
All 15- EASA AD 2025-0022Engine Fuel & Control — Fuel Control System — Additive ApplicationJan 21, 2025
- EASA AD 2024-0194Engine — Centrifugal Compressor Case — InspectionsOct 15, 2024
- EASA AD 2024-0040-EEngine – Centrifugal Compressor Case – InspectionFeb 8, 2024
- EASA AD 2021-0264R1Engine — Critical Parts — ReplacementMar 28, 2023
- EASA AD 2023-0020Time Limits / Maintenance Checks — Airworthiness Limitations Section — AmendmentJan 23, 2023
Get the next one by email
New ADs and bulletins for Ge Aviation Czech M601 and Aircraft Industries L-410, summarized like this page, every Monday.