Commonwealth legislation

AD/A320/21 - Main Landing Gear Wheel Axle

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

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Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

CASA issues a mandatory Airworthiness Directive requiring immediate inspection and repair of main landing gear axles on certain early-model Airbus A319/A320/A321 twin-wheel aircraft. Manufacturing overheating during chrome plating can cause hidden cracks at the brake attachment, risking axle failure.

The AD applies to owners/operators of specified MSNs (early serial ranges) and mandates inspections and corrective work per DGAC AD 90-096-010(B)/Airbus SB A320-32-1031, to be completed before 6,600 flights.

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AD/A320/21 - Main Landing Gear Wheel Axle

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Airbus Industrie A319, A320 and A321 Series Aeroplanes

AD/A320/21 Main Landing Gear Wheel Axle 10/91

Applicability: Models A321-111, A320-211, A320-231, Serial Numbers MSN 002 to 044, 052 to 055, 059 to 073, 076 to 078 and 081, fitted with twin wheel main landing gear.

Requirement: Action in accordance with the Technical Requirements of DGAC AD 90-096-010 (B), dated 2 May 1990.

Note: Airbus Industry Service Bulletin A320-32-1031, Revision 1, dated 19 March 1990, refers.

Compliance: Prior to the accumulation of 6 600 flights.

Background: The chrome plate grinding process used during manufacture may have caused overheating of the main landing gear axle and introduced residual stresses in the flange to axle radius. In some sliding tube assemblies, this has caused cracks under the chrome plating in the area of the brake mounting flange, with a subsequent reduction in safe operating life.

Source text

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

1 AD/A320/21 - Main Landing Gear Wheel Axle