Engine — Oil Pump — Replacement
- Published
- Effective
- Deadline
- Replaces
- 2021-0055R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace affected oil pumps with serviceable parts and change the oil and oil filter within specified compliance times based on engine group and flight hours, ranging from within one month or before 10 flight hours to within three months or up to 100 flight hours after the effective date. Additionally, no affected oil pump parts may be installed or reinstalled on any engine from the effective date onward. Compliance with Austro Engine Service Bulletin MSB-E4-030 Revision 4 is required.
Summary
EASA Airworthiness Directive 2021-0094 is an official regulatory document addressing the replacement of oil pumps on Austro Engine GmbH E4 and E4P engines, commonly installed on Diamond Aircraft Industries DA 40 NG, DA 42 NG, DA 42 M-NG, and DA 62 aeroplanes. The directive mandates the replacement of certain affected oil pumps due to contamination issues that could lead to engine lubrication failure. It applies to all serial numbers of these engine models and prohibits installation of affected parts.
What changed
EASA Airworthiness Directive 2021-0094 supersedes the previous AD 2021-0055R1 and updates the list of affected engine serial numbers and oil pump part numbers. It introduces an additional oil pump replacement option and expands the applicability to include all engines where the affected oil pump part is eligible for installation. The directive also prohibits the installation or reinstallation of any affected oil pump parts on any engine from the effective date.
Why it matters
This directive is critical for aviation professionals because the affected oil pumps have been found to contain casting sand contamination, which can block oil flow and cause engine lubrication failure. Failure to comply could result in engine in-flight shutdown, forced landings, and potential damage or injury. Operators, maintenance organizations, and compliance teams must ensure timely replacement to maintain airworthiness and safety.
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- EASA AD 2022-0240R1Engine – Pistons – Oil Analysis / ReplacementDec 15, 2022
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