Engine – Oil Pump – Replacement
Superseded. Comply with 2021-0094, which replaces this document.
- Published
- Effective
- Replaces
- 2021-0055
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace affected oil pumps, oil, and filters within specified compliance times based on engine flight hours and group classification, with some replacements required before the next flight after 1 March 2021. A single ferry flight is permitted for positioning aircraft to a maintenance location if the engine has 10 flight hours or less. Compliance with Austro Engine Service Bulletin MSB-E4-030 Revision 2 instructions is mandatory.
Summary
EASA Airworthiness Directive 2021-0055R1 is a regulatory document addressing safety concerns related to Austro Engine GmbH E4 and E4P engines installed on aircraft such as Diamond Aircraft Industries DA 40 NG, DA 42 NG, DA 42 M-NG, and DA 62. The directive mandates the replacement of certain oil pumps identified by part number E4A-50-000-BHY due to reported blockages caused by casting sand contamination. This AD ensures continued airworthiness by requiring operators to replace affected oil pumps and associated oil and filters.
What changed
EASA Airworthiness Directive 2021-0055R1 revises the original AD 2021-0055 by referencing Austro Engine Service Bulletin MSB-E4-030 Revision 2, which removes some engines from applicability and expands the list of affected oil pump serial numbers. The revision clarifies compliance requirements without impacting the original compliance deadlines, as newly added serial numbers are still in stock and not delivered to operators.
Why it matters
This directive is critical for aviation professionals because oil pump blockages can lead to engine lubrication failure and potential in-flight engine shutdowns, posing serious safety risks. Operators and maintenance organizations must comply to prevent forced landings and possible damage or injury. Compliance ensures regulatory adherence and maintains aircraft safety and reliability.
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