Commonwealth legislation

AD/A320/46 Amdt 4 - Inboard Flap Trunnion

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This Airworthiness Directive mandates initial and repetitive inspections of the inboard flap trunnion on Airbus A319/A320/A321 aeroplanes (except aircraft produced with Airbus mod 26495 or with SB A320-27-1117 incorporated) to detect chafing wear (reported at 0.118 inches) that could compromise the trunnion primary load path. Operators must carry out the inspections and any corrective work in accordance with the technical requirements of the referenced DGAC AD and Airbus service bulletins (Applicability; Requirement; Background).

Operators pay inspection and repair costs, face aircraft downtime risks, and must follow external DGAC/SB documents, creating administrative and technical compliance burden (Requirement; Note; Background).

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AD/A320/46 Amdt 4 - Inboard Flap Trunnion

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/A320/46

Amdt 4

Inboard Flap Trunnion 11/99

Applicability: A319, A320, and A321 aircraft, all models and serial numbers; without Airbus Industrie modification 26495 installed at production or Service Bulletin

A320-27-1117 incorporated.

Requirement: Action in accordance with the technical requirements of DGAC AD 1996-271-092 (B) R3.

Note: Airbus Industrie Service Bulletins A320-27-1066 Revision 5, -1050, -1097 Revision 2, -1108 Revision 3, and -1117 refer.

Compliance: As specified in the Requirement document for the initial and repetitive inspection requirements.

This Amendment becomes effective on 4 November 1999.

Background: An operator reported wear marks 0.118 inches deep in the inboard flap attachment trunnion caused by chafing of the sliding panel drive chain. This could lead to rupture of the trunnion primary load path and subsequently adversely influence the fatigue life of the secondary load path. Inspection of the trunnion will ensure that the critical depth is not reached.

Amendment 1 amended the applicability, and included inspections for all mod. states across the various aircraft. Amendment 2 reflected a revision of the DGAC AD which introduced revised requirement documents. Amendment 3 clarified applicability.

Amendment 4 is issued in response to a new DGAC AD which introduces revisions of the related service bulletins and clarifies compliance requirements.

Amendment 3 of this Airworthiness Directive became effective on 17 June 1999. Amendment 2 of this Airworthiness Directive became effective on 1 January 1998. The original issue of this Airworthiness Directive became effective on 27 April 1995.

Source text

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

1 AD/A320/46 Amdt 4 - Inboard Flap Trunnion