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Airworthiness Directive

AD 2021-22-20 86 FR 60159 Superseded

Federal Aviation Administration · 14 CFR part 39

Prompted by reports of failure of the high-pressure pump (HPP) driving gear and a subsequent determination that a batch of HPP driving gears may have been damaged during assembly.

Superseded by AD 2022-03-03Federal Register (opens in a new tab)

FR document
2021-23842
Amendment
39-21793
Published
2021-11-01
Effective
2021-11-16
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2021-22-20 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

This page is a reference Record, not an airworthiness or compliance determination. Official FAA and manufacturer sources control over our restatement, subject to governing law. Check applicability, current requirements and incorporated documents before acting. The owner or operator remains responsible for airworthiness and required records under 14 CFR 91.403 and 91.417, as applicable. Terms of Use: /terms.

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AD

2021-22-20

FR doc 2021-23842 · 86 FR 60159

AD 2021-22-20Published 2021-11-01Effective 2021-11-16

Superseded by 2022-03-03

Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Prompted by reports of failure of the high-pressure pump (HPP) driving gear and a subsequent determination that a batch of HPP driving gears may have been damaged during assembly.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain Austro Engine GmbH E4 and E4P model diesel piston engines. This AD was prompted by reports of failure of the high-pressure pump (HPP) driving gear and a subsequent determination that a batch of HPP driving gears may have been damaged during assembly. This AD requires, for engines with an affected cylinder head, inspection of the HPP driving gear and, depending on the results of the inspection, replacement of the HPP driving gear with a part eligible for installation. This AD also requires, for engines with an affected HPP driving gear, replacement of the HPP driving gear either before further flight or within a certain number of flight hours after the effective date of this AD. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Austro Engine E4

  1. AD 2025-02-12 Airworthiness Directives; Austro Engine GmbH Engines Effective 2025-04-01
  2. AD 2024-19-10 Airworthiness Directives; Austro Engine GmbH Engines Effective 2024-10-09
  3. AD 2024-05-01 Airworthiness Directives; Austro Engine GmbH Engines Effective 2024-03-11
  4. AD 2023-20-03 Airworthiness Directives; Austro Engine GmbH Engines Effective 2023-12-11
  5. AD 2022-03-03 Airworthiness Directives; Austro Engine GmbH Engines Effective 2022-02-14

All Austro Engine E4 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2021-22-20 (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index