Commonwealth legislation

AD/GAF-N22/64 - Aileron Structure

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires operators of GAF Nomad N22 and N24 aircraft fitted with specified aileron part numbers to inspect those ailerons and install Modification N634, following ASTA Nomad Alert Service Bulletin ANMD-57-9. It was issued after reports of aileron leading-edge skin buckling and an incident of aileron flutter linked to prior overspeed damage; the measures are intended to find and fix structural degradation that could lead to loss of control.

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AD/GAF-N22/64 - Aileron Structure

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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GAF N22 and N24 Series Aeroplanes

AD/GAF-N22/64 Aileron Structure 13/92 DM

Applicability: Model N22 and N24 Series, equipped with ailerons P/N 1/N-24-101 LH, P/N 1/N-24- 102 RH, P/N 2/N-24-101 LH, and P/N 2/N-24-102 RH. Aircraft LS62, 119, and 159

to 165 are excepted.

Requirement: 1. Carry out an inspection of the ailerons in accordance with the Accomplishment Instructions of ASTA Nomad Alert Service Bulletin ANMD-57-9.

Incorporate Modification N634 in accordance with the Accomplishment Instructions of ASTA Nomad Alert Service Bulletin ANMD-57-9.

Compliance: 1. Within 50 hours time in service after 28 October 1992.

Prior to 31 December 1993.

Background: The manufacturer had received reports from several operators of instances of buckling of the aileron leading edge skin, which was believed to be the cause of a loss of control of the affected aircraft. One loss of control incident was considered to be a result of aileron flutter, which had occurred at a lower than normal speed because the ailerons had suffered structural degradation, caused by a flap/aileron overspeed at some time prior to the incident.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/GAF-N22/64 - Aileron Structure