Commonwealth legislation

AD/F100/11 - Rear Spar & MLG Bottom Joint Fittings

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

The Airworthiness Directive requires replacement and reinforcement of specific main landing gear and rear spar fittings on Fokker F.28 Mk.0100 aircraft (serials 11244–11390) per Fokker Service Bulletin F100-57-020, to be completed before each affected airplane reaches 13,500 flight cycles.

Ordered after fatigue testing found cracks that threaten structural integrity, the AD (effective 22 April 1999) shifts compliance costs and scheduling to aircraft owners/operators and creates near‑term demand for qualified maintenance and parts suppliers.

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AD/F100/11 - Rear Spar & MLG Bottom Joint Fittings

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/11 Rear Spar & MLG Bottom Joint Fittings 4/99

Applicability: F.28 Mk.0100 aircraft, serial numbers, 11244 through 11390.

Requirement: Replace affected fittings and reinforce the MLG spar fittings, the rear spar webs and the new bottom joint fittings in accordance with Fokker Service Bulletin (SB) F100- 57-020 dated 27 April 1992.

Note: RLD BLA 92-075 refers.

Compliance: Unless previously accomplished, before accumulating 13,500 flight cycles since new.

This Airworthiness Directive becomes effective on 22 April 1999.

Background: During fatigue testing of the F.28 Mk.0100, cracks were found in the main landing gear spar fitting at wing STA.2800 and in the rear spar web at STA.2900. This condition, if not corrected, will result in loss of structural integrity of the aircraft in the affected areas. This AD requires the replacement of the affected fittings and subsequent reinforcement.

Source text

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

1 AD/F100/11 - Rear Spar & MLG Bottom Joint Fittings