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Airworthiness Directive

AD 2021-20-21 86 FR 60550 Active

Federal Aviation Administration · 14 CFR part 39

Requires an initial inspection and adjustment of the engine push-pull control and replacement of the beta switch.

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FR document
2021-23879
Amendment
39-21759
Published
2021-11-03
Effective
2021-11-18
Models covered
1

Last live check: 2026-08-19

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AD

2021-20-21

FR doc 2021-23879 · 86 FR 60550

AD 2021-20-21Published 2021-11-03Effective 2021-11-18

Supersedes 2018-16-10

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.

Requires an initial inspection and adjustment of the engine push-pull control and replacement of the beta switch.

Full official abstract

The FAA is superseding Airworthiness Directive (AD) 2018-16-10 which applied to certain GE Aviation Czech s.r.o. (GEAC) H80-200 model turboprop engines. AD 2018-16-10 required an adjustment of the engine push-pull control and replacement of the beta switch to prevent the propeller governor control from going to a negative thrust position. This AD requires an initial inspection and adjustment of the engine push-pull control and replacement of the beta switch. This AD also requires inspection and adjustment of the engine push-pull control after any maintenance, repair or modification that affects the push- pull control and installation of an improved push-pull control. This AD also expands the applicability to include GEAC H85-200 model turboprop engines with Avia Propeller AV-725 propellers installed. This AD was prompted by an accident involving an Aircraft Industries (AI) L 410 UVP-E20 airplane caused by one propeller going to a negative thrust position during the landing approach. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for GE Aviation Czech M601/H80

  1. AD 2025-18-08 Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Pre... Effective 2025-10-21
  2. AD 2024-06-02 Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Pre... Effective 2024-04-11
  3. AD 2024-03-05 Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Pre... Effective 2024-04-17
  4. AD 2024-02-04 Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Pre... Effective 2024-03-28
  5. AD 2024-01-03 Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Pre... Effective 2024-02-27

All GE Aviation Czech M601/H80 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (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