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Airworthiness Directive

AD 96-06-03 61 FR 11129 Active

Federal Aviation Administration · 14 CFR part 39

Requires initial and repetitive inspections of a certain main rotor transmission clutch assembly (clutch assembly) for bearing roughness, noise, lock-up, or improper oil level and, if necessary, replacement of the clutch assembly.

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FR document
96-6421
Amendment
39-9540
Published
1996-03-19
Models covered
1

Last live check: 2026-10-04

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AD

96-06-03

FR doc 96-6421 · 61 FR 11129

AD 96-06-03Published 1996-03-19

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 initial and repetitive inspections of a certain main rotor transmission clutch assembly (clutch assembly) for bearing roughness, noise, lock-up, or improper oil level and, if necessary, replacement of the clutch assembly.

Supersedes an earlier directive. See the official text.

Full official abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to The Enstrom Helicopter Corporation (Enstrom) Model F-28, F-28A, F-28C, F-28C-2, F-28F, 280, 280C, 280F, and 280FX helicopters, that currently requires initial and repetitive inspections of a certain main rotor transmission clutch assembly (clutch assembly) for bearing roughness, noise, lock-up, or improper oil level and, if necessary, replacement of the clutch assembly. The existing AD also requires replacement of the clutch assembly at certain time-in-service intervals. This amendment requires the same inspections and replacements as required by the existing AD, but would provide for installation of an additional approved replacement part number and provide a reference to three additional manufacturer service documents. This amendment is prompted by the approval of an additional replacement clutch assembly; the manufacturer's issuance of additional service information, and the need to correct a service information letter's number. The actions specified by this AD are intended to prevent failure of the clutch assembly, loss of control of the main rotor 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 2011-26-10 Airworthiness Directives; Enstrom Helicopter Corporation Helicopters Effective 2012-01-23

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) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index