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Airworthiness Directive

AD 97-11-12 62 FR 28997 Active

Federal Aviation Administration · 14 CFR part 39

Requires repetitively inspecting the stub wing upper front spar cap flanges for cracks, and repairing any cracked part.

Federal Register (opens in a new tab)

FR document
97-14077
Amendment
39-10041
Published
1997-05-29
Effective
1997-07-11
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/97-11-12 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

97-11-12

FR doc 97-14077 · 62 FR 28997

AD 97-11-12Published 1997-05-29Effective 1997-07-11

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 repetitively inspecting the stub wing upper front spar cap flanges for cracks, and repairing any cracked part.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that applies to Aerospace Technologies of Australia Pty Ltd. (ASTA) Models N22B, N22S, and N24A airplanes. This action requires repetitively inspecting the stub wing upper front spar cap flanges for cracks, and repairing any cracked part. This AD results from fatigue tests that show that the stub wing upper front spar cap flanges could fail over time because of fatigue. The actions specified by this AD are intended to prevent structural failure of the front spar caused by cracks in the stub wing upper front spar cap flanges, which could result in loss of control of the airplane.

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All GAF Nomad N22 / N24 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 97-11-12 (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