Commonwealth legislation

AD/F50/67 - Main Landing Gear Drag Stay Tubes

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This mandatory safety directive requires owners and operators of Fokker F27 Mk050 aircraft with main landing gear drag stay tubes P/N 200684001 to ultrasonic‑inspect those tubes per Dowty Aerospace SB F50‑32‑50, remove any “stepped bore” tubes immediately, and re‑identify approved straight‑bore tubes as P/N 200684004.

It responds to a stepped‑bore tube failure that caused a landing‑gear collapse traced to an internal manufacturing defect; the actions prevent similar in‑service failures.

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Current sections

Direct links to the current provisions in AD/F50/67 - Main Landing Gear Drag Stay Tubes.

AD/F50/67 - Main Landing Gear Drag Stay Tubes

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F50 (F27 Mk 50) Series Aeroplanes

AD/F50/67 Main Landing Gear Drag Stay Tubes 8/95

Applicability: Fokker F27 Mk050 series aircraft fitted with main landing gear drag stay tube P/N 200684001.

Requirement: 1. Do an ultrasonic inspection of the drag stay tube in accordance with Dowty Aerospace Service Bulletin F50-32-50 to confirm that a straight bore tube is installed.

2. Remove all stepped bore tubes from service.

3. Re-identify all straight bore tubes with P/N 200684004.

Note 1: RLD AD 93-169/2 and Fokker SB F50-32-029 refer.

Compliance: 1. Inspect in accordance with Requirement 1 before 20 September 1995.

Inspect spare tubes before installation on an aircraft.

Remove from service in accordance with Requirement 2 or re-identify in accordance with Requirement 3 before further flight.

Background: One instance of a failed drag stay tube has been reported on F27 aircraft, F50 aircraft utilise an identical drag stay tube. The failure caused the landing gear to collapse and was attributed to a crack originating at an incorrectly machined step on the tube interior. This AD will ensure that all such tubes are identified and removed from service.

Source text

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

1 AD/F50/67 - Main Landing Gear Drag Stay Tubes