Engine – High Pressure Pump Driving Gear – Inspection / Replacement
Superseded. Comply with 2021-0274-E, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2021-0203-E
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect HPP driving gears on engines equipped with affected cylinder heads before the next flight after 14 September 2021. If inspection criteria are not met, they must follow Austro Engine's approved corrective instructions or replace the HPP gear within specified flight hour limits. Twin-engine aircraft with affected engines may conduct a single ferry flight to a maintenance location for compliance.
Summary
EASA Airworthiness Directive 2021-0203R1 is an updated directive addressing the inspection and replacement of high pressure pump (HPP) driving gears on Austro Engine GmbH E4 and E4P engines. These engines are commonly installed on Diamond Aircraft Industries models DA 40 NG, DA 42 NG, DA 42 M-NG, and DA 62. The directive mandates inspections and possible replacements of affected HPP gears and cylinder heads to prevent premature gear failure.
What changed
EASA Airworthiness Directive 2021-0203R1 revises the original Emergency AD 2021-0203-E by allowing the temporary installation of affected HPP driving gears as replacement parts. It also clarifies inspection and replacement procedures and compliance timelines for different engine groups and flight hour accumulations.
Why it matters
This directive is critical for aviation professionals because it addresses a potential unsafe condition that could lead to engine in-flight shutdown and forced landings. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and safety, preventing possible damage to aircraft and injury to occupants.
More for Austro Engine Gmbh E4
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- EASA AD 2024-0037R1Engine — Main Bearing / Studs — ReplacementFeb 6, 2024
- EASA AD 2023-0163Engine — Pistons — Oil Analysis / ReplacementAug 18, 2023
- EASA AD 2022-0240R1Engine – Pistons – Oil Analysis / ReplacementDec 15, 2022
- EASA AD 2021-0274-EEngine — High Pressure Pump Driving Gear — Inspection / ReplacementDec 9, 2021
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