Commonwealth legislation

AD/F50/30 - Fuselage Upper Girder Connection at Frame Sta. 3415

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of specified Fokker F27 Mk 50 (F50) aeroplanes (serial numbers 20103–20108 and 20110–20147) to install a reinforcement bracket at the fuselage upper girder connection at frame station 3415, following Fokker Service Bulletin F50‑53‑020 (15 Sept 1989). The regulator says the change fixes insufficient fatigue resistance found in full‑scale tests; installation must be completed before the aeroplane reaches 10,000 flight cycles.

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AD/F50/30 - Fuselage Upper Girder Connection at Frame Sta. 3415

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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 Fokker F50 (F27 Mk 50) Series Aeroplanes

AD/F50/30 Fuselage Upper Girder Connection at Frame Sta. 3415

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Applicability: F27 Mark 50, serial numbers 20103 through to 20108, and 20110 through to 20147.

Requirement: Incorporate reinforcement modification in accordance with Fokker Service Bulletin F50-53-020 dated 15 September 1989.

Note: RLD BLA 89-110 refers.

Compliance: Prior to accumulating 10,000 flight cycles.

Background: Full scale fatigue tests have determined that the connection angle between the upper girder of the flight compartment window and the upper torsion box of the passenger door has insufficient fatigue resistance. This AD introduces a reinforcement bracket to the area.

Source text

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