Commonwealth legislation

AD/F27/122 Amdt 1 - MLG Upper Member

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Commonwealth

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legislative instrument

Plain English Summary

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Operators of specified Fokker F27 series aeroplanes (listed serials, amendment adding Mk 500) must carry out a one‑time inspection and radius rework of the main landing‑gear upper member per Fokker SB F27/32‑162 before 1 January 1992. The action addresses fatigue cracking found at a cross‑bore edge; costs and downtime fall to aircraft owners, while the regulator enforces compliance.

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AD/F27/122 Amdt 1 - MLG Upper Member

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F27 Series Aeroplanes

AD/F27/122

Amdt 1

MLG Upper Member 12/91

Applicability: Model F27 series with serial numbers 10102 through 10684, 10686 and 10687, 10689

through 10692.

Requirement: Inspect and modify in accordance with Fokker SB F27/32-162.

Note: RLD AD 91-041 refers.

Compliance: Before 1 January 1992. (Same as previous issue of this Directive.)

Background: Several main undercarriage upper members were found on inspection to have a fatigue crack at the intersection of the side face and the cross bore. Therefore Fokker is calling for a one time inspection of the rest of the fleet, and a rework to radius the edge of the cross bore to prevent further cracking.

Amendment 1 is raised to align this Directive with the related RLD AD, which calls up the above Fokker bulletin, and in doing so now includes the Mk 500.

Source text

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

1 AD/F27/122 Amdt 1 - MLG Upper Member