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Airworthiness Directive

AD 2021-18-16 86 FR 53203 Active

Federal Aviation Administration · 14 CFR part 39

Requires repetitive torque checks of the tail rotor gearbox attachment hardware, and corrective action if necessary.

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FR document
2021-20829
Amendment
39-21717
Published
2021-09-27
Effective
2021-11-01
Models covered
1

Last live check: 2026-10-04

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AD

2021-18-16

FR doc 2021-20829 · 86 FR 53203

AD 2021-18-16Published 2021-09-27Effective 2021-11-01

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 repetitive torque checks of the tail rotor gearbox attachment hardware, and corrective action if necessary.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 429 helicopters. This AD was prompted by reports of tail rotor gearbox assemblies found loose on the gearbox support. This AD requires repetitive torque checks of the tail rotor gearbox attachment hardware, and corrective action if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Bell 429

  1. AD 2026-06-02 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2026-04-24
  2. AD 2024-07-51 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2024-06-10
  3. AD 2022-20-11 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2022-11-28
  4. AD 2022-09-07 Airworthiness Directives; Bell Textron Canada Limited (Type Certificate ... Effective 2022-05-31
  5. AD 2022-08-11 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2022-05-27

All Bell 429 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