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Airworthiness Directive

AD 2001-22-01 66 FR 54418 Active

Federal Aviation Administration · 14 CFR part 39

FR document
01-26965
Amendment
39-12479
Published
2001-10-29
Effective
2001-11-13
Models covered
1
Last live check
2026-09-30

Printed from https://aircraftdirectives.com/ad/2001-22-01 · 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

2001-22-01

FR doc 01-26965 · 66 FR 54418

AD 2001-22-01Published 2001-10-29Effective 2001-11-13

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 inspecting the main rotor shaft (shaft) for a crack or other evidence of damage until appropriately modifying or replacing the shaft with an airworthy shaft at specified time intervals.

Full official abstract

This amendment supersedes an existing airworthiness directive (AD) for Enstrom Helicopter Corporation (EHC) Model F-28, F-28A, and 280 helicopters. That AD currently requires inspecting the main rotor shaft (shaft) for a crack or other evidence of damage until appropriately modifying or replacing the shaft with an airworthy shaft at specified time intervals. This amendment adds EHC Model F-28C, F- 28F, 280C, 280F, and 280FX helicopters and establishes life limits after which all unmodified shafts must be retired. This amendment requires determining the radius of the shaft fillet, certain visual and dye-penetrant inspections before further flight, and replacing certain main rotor transmissions. This amendment is prompted by the failure of a shaft on an EHC Model F-28A helicopter due to a fatigue crack. The actions specified by this AD are intended to prevent shaft failure and subsequent loss of control of the helicopter.

More directives for Enstrom F-28 / 280 / 480

  1. AD 2018-02-01 Airworthiness Directives; The Enstrom Helicopter Corporation Helicopters 2018-01-17
  2. AD 2017-26-03 Airworthiness Directives; The Enstrom Helicopter Corporation Helicopters 2017-12-20
  3. AD 2015-08-51 Airworthiness Directives; The Enstrom Helicopter Corporation 2015-05-18
  4. AD 2012-11-05 Airworthiness Directives; Enstrom Helicopter Corporation Helicopters 2012-06-18
  5. AD 2011-26-10 Airworthiness Directives; Enstrom Helicopter Corporation Helicopters 2012-01-06

All Enstrom F-28 / 280 / 480 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2001-22-01 (opens in a new tab)

Applies to 1 model in our index