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Airworthiness Directive

AD 2021-24-15 86 FR 70966 Active

Federal Aviation Administration · 14 CFR part 39

Requires visually inspecting the drive ring spline teeth and the mating area spline teeth on the oil cooler blower shaft for signs of deformation and fretting and depending on the results of the inspection, removing certain parts…

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FR document
2021-27012
Amendment
39-21836
Published
2021-12-14
Effective
2022-01-18
Models covered
1

Last live check: 2026-10-04

Printed from https://aircraftdirectives.com/ad/2021-24-15 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

2021-24-15

FR doc 2021-27012 · 86 FR 70966

AD 2021-24-15Published 2021-12-14Effective 2022-01-18

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 visually inspecting the drive ring spline teeth and the mating area spline teeth on the oil cooler blower shaft for signs of deformation and fretting and depending on the results of the inspection, removing certain parts from service.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for Bell Textron Canada Limited Model 206L-1, 206L-3, and 206L-4 helicopters with certain Air Comm Corporation air conditioning systems installed. This AD was prompted by reports of damage to the drive ring spline teeth and the mating spline teeth. This AD requires visually inspecting the drive ring spline teeth and the mating area spline teeth on the oil cooler blower shaft for signs of deformation and fretting and depending on the results of the inspection, removing certain parts from service. This AD also requires reinstalling certain parts, applying torque, and aligning certain bolt holes. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Bell 206 JetRanger / LongRanger

  1. AD 2023-06-05 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2023-05-19
  2. AD 2022-22-08 Airworthiness Directives; Bell Textron Canada Limited (Type Certificate ... Effective 2022-12-23
  3. AD 2022-20-04 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2022-12-23
  4. AD 2021-26-08 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2022-01-27
  5. AD 2021-19-01 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2021-10-13

All Bell 206 JetRanger / LongRanger 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