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Airworthiness Directive

AD 2004-05-24 69 FR 12057 Active

Federal Aviation Administration · 14 CFR part 39

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FR document
04-5262
Amendment
39-13519
Published
2004-03-15
Effective
2004-03-30
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2004-05-24 · 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

2004-05-24

FR doc 04-5262 · 69 FR 12057

AD 2004-05-24Published 2004-03-15Effective 2004-03-30

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 replacing certain zinc-plated crankshaft gear retaining bolts.

Supersedes an earlier directive. See the official text.

Full official abstract

The FAA is superseding an existing airworthiness directive (AD) for Lycoming Engines (Formerly Textron Lycoming) AEIO-540, IO-540, LTIO-540, O-540, and TIO-540 series reciprocating engines. That action requires replacing certain zinc-plated crankshaft gear retaining bolts. This action retains that requirement, but expands the population of affected engines. In addition, this AD adds five additional kits for replacing the crankshaft gear retaining bolts. This AD results from notification from the Manufacturer of 161 engines not identified in the previous AD. This AD also results from approval of the five additional kits as alternative methods of compliance with AD 2002-23-06. We are issuing this AD to prevent loss of all engine power and possible forced landing.

More directives for Lycoming O-540

  1. AD 2026-17-10 Airworthiness Directives; Lycoming Engines Effective 2026-09-14
  2. AD 2022-16-03 Airworthiness Directives; Continental Aerospace Technologies, Inc., Lyco... Effective 2022-08-15
  3. AD 2017-11-10 Airworthiness Directives; Lycoming Engines Reciprocating Engines Effective 2017-06-28
  4. AD 2015-10-06 Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type C... Effective 2015-07-02
  5. AD 2013-22-23 R1 Airworthiness Directives; AERMACCHI S.p.A. Airplanes Effective 2014-07-11

All Lycoming O-540 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