Airworthiness Directive · Amendment 39-16311 · Wings
AeroSpace Technologies of Australia Pty Ltd Models N22B, N22S, and N24A Airplanes
This AD applies to Models N22B, N22S, and N24A airplanes, all serial numbers, certificated in any category.
We are superseding an existing airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions in accordance with Nomad Service Bulletin NMD-53-22, dated June 4, 2007:
(1) Within the next 100 hours time-in-service (TIS) after July 6, 2010 (the effective date of this AD), or within the next 90 days after July 6, 2010 (the effective date of this AD), whichever occurs first, install an inspection hole in the left-hand and right-hand stub wing bottom skin.
(2) Before further flight after installing the inspection hole required in paragraph (f)(1) of this AD, initially inspect the stub wing front spar cap for cracks. Repetitively thereafter inspect at intervals not to exceed every 600 hours TIS.
(3) If any crack is found during any inspection required in paragraph (f)(2) of this AD, before further flight contact Customer Support Manager, Gippsland Aeronautics Pty Ltd., P.O. Box 881, MORWELL, Victoria, 3040, Australia; phone: +61 3 5172 1200; fax: +61 3 5172 1201; e-mail: support@gippsaero.com, for an FAA-approved repair scheme/modification and incorporate the repair scheme/modification. Due to FAA policy, the repair scheme/modification for crack damage must include an immediate repair of the crack. The repair scheme cannot be by repetitive inspection only. The repair scheme/modification may incorporate repetitive inspections in addition to the repetitive inspections required in paragraph (f)(2) of this AD. Continued operational flight with un-repaired crack damage is not permitted.
Note: This AD differs from the MCAI and/or service information as follows: The MCAI states to follow the service bulletin. The service bulletin does not specifically call out a corrective action if cracks are found. The FAA is including specific instruction of corrective action in the AD.
