Commonwealth legislation

AD/GAF-N22/27 - Rudder Tab - Modification

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires owners/operators of GAF N22 and N22B aeroplanes to modify the rudder tab system per GAF SB NMD‑27‑3 Rev.1 to restore flutter margin, with a compliance deadline. Until modification is completed the aircraft must not exceed 180 Kts IAS. Operators bear the cost, scheduling and rely on the service bulletin for the technical fix.

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AD/GAF-N22/27 - Rudder Tab - Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source GAF N22 and N24 Series Aeroplanes

AD/GAF-N22/27 Rudder Tab - Modification 8/79

Applicability: All models N22 and N22B not modified in accordance with GAF SB No. NMD-27-3, Rev. 1.

Requirement: Modify in accordance with GAF SB No. NMD-27-3, Rev. 1.

Note: The speed of 180 Kts IAS should not be exceeded on aircraft not yet modified.

Compliance: Before 1 December 1979.

Background: Manufacturer’s tests indicate that wear and backlash which may develop in the rudder tab system during normal service may erode the tab/rudder flutter speed margins.

Source text

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