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Airworthiness Directive

AD 2009-25-02 74 FR 63565 Active

Federal Aviation Administration · 14 CFR part 39

Requires you to inspect between the surface of the left-hand (LH) and right- hand (RH) upper wing skins and the engine mount beam support straps for any signs of corrosion, replace the upper steel straps with parts of improved…

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FR document
E9-28548
Amendment
39-16119
Published
2009-12-04
Effective
2010-01-08
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2009-25-02 · 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

2009-25-02

FR doc E9-28548 · 74 FR 63565

AD 2009-25-02Published 2009-12-04Effective 2010-01-08

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 you to inspect between the surface of the left-hand (LH) and right- hand (RH) upper wing skins and the engine mount beam support straps for any signs of corrosion, replace the upper steel straps with parts of improved design, and modify both wings.

Full official abstract

We are adopting a new airworthiness directive (AD) for certain Twin Commander Aircraft LLC Models 690, 690A, and 690B airplanes. This AD requires you to inspect between the surface of the left-hand (LH) and right- hand (RH) upper wing skins and the engine mount beam support straps for any signs of corrosion, replace the upper steel straps with parts of improved design, and modify both wings. This AD results from reports that corrosion was found between the mating surfaces of the wing upper skin surface and the engine mount beam support straps. We are issuing this AD to detect and correct corrosion on the engine mount beam support straps and the upper wing skins, which could result in failure of the engine mount beam support straps. This failure could lead to loss of the engine and possible loss of control of the airplane.

More directives for Twin Commander (Aero Commander)

  1. AD 2013-09-05 Airworthiness Directives; Twin Commander Aircraft LLC Airplanes Effective 2013-05-29
  2. AD 2006-15-01 Airworthiness Directives; Twin Commander Aircraft Corporation Models 690... Effective 2006-08-21
  3. AD 2003-07-03 Airworthiness Directives; Twin Commander Aircraft Corporation Models 690... Effective 2003-05-16
  4. AD 2000-02-30 Airworthiness Directives; Twin Commander Aircraft Corporation 600 Series... Effective 2000-03-24
  5. AD 98-08-25 R1 Airworthiness Directives; Twin Commander Aircraft Corporation 500, 680, ... Effective 1999-01-05

All Twin Commander (Aero Commander) 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