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Airworthiness Directive

AD 2001-25-02 66 FR 63915 Active

Federal Aviation Administration · 14 CFR part 39

FR document
01-30499
Amendment
39-12554
Published
2001-12-11
Models covered
1
Last live check
2026-10-03

Printed from https://aircraftdirectives.com/ad/2001-25-02 · 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

2001-25-02

FR doc 01-30499 · 66 FR 63915

AD 2001-25-02Published 2001-12-11

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 establishing a life limit for certain upper and lower main rotor hub plates of 5000 hours time-in-service (TIS), creating a component history card or equivalent record, and replacing each main rotor hub plate (hub plate)…

Full official abstract

This amendment adopts a new airworthiness directive (AD) for Enstrom Helicopter Corporation (EHC) Model TH-28 and 480 helicopters. This AD requires establishing a life limit for certain upper and lower main rotor hub plates of 5000 hours time-in-service (TIS), creating a component history card or equivalent record, and replacing each main rotor hub plate (hub plate) having 5000 or more hours TIS with an airworthy hub plate. This AD is prompted by a recent reliability-based stress analysis that indicates a 5000-hour TIS life limit should be imposed on certain hub plates. The actions specified by this AD are intended to prevent failure of a hub plate, loss of control of the main rotor, 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) View this AD in FAA DRS (opens in a new tab)

Applies to 1 model in our index