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Airworthiness Directive

AD 2011-26-10 77 FR 729 Active

Federal Aviation Administration · 14 CFR part 39

Requires modifying and testing the lateral and longitudinal cyclic trim actuator assemblies.

Federal Register (opens in a new tab)

FR document
2011-32895
Amendment
39-16900
Published
2012-01-06
Effective
2012-01-23
Models covered
1

Last live check: 2026-10-04

Printed from https://aircraftdirectives.com/ad/2011-26-10 · 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

2011-26-10

FR doc 2011-32895 · 77 FR 729

AD 2011-26-10Published 2012-01-06Effective 2012-01-23

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 modifying and testing the lateral and longitudinal cyclic trim actuator assemblies.

Full official abstract

We are adopting a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28C, F-28C-2, F-28F, 280C, 280F, 280FX TH-28, 480, and 480B helicopters with certain trim relays to require modifying and testing the lateral and longitudinal cyclic trim actuator assemblies. This AD was prompted by four failures in the cyclic trim system on certain Enstrom model helicopters that resulted in reduced controllability of the helicopter. These actions are intended to prevent failure of the cyclic trim system 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 Effective 2018-02-21
  2. AD 2017-26-03 Airworthiness Directives; The Enstrom Helicopter Corporation Helicopters Effective 2018-01-04
  3. AD 2015-08-51 Airworthiness Directives; The Enstrom Helicopter Corporation Effective 2015-06-02
  4. AD 2012-11-05 Airworthiness Directives; Enstrom Helicopter Corporation Helicopters Effective 2012-07-03
  5. AD 2007-11-02 Airworthiness Directives; Enstrom Helicopter Corporation Model F-28A, F-... Effective 2007-10-02

All Enstrom F-28 / 280 / 480 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2011-26-10 (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