Commonwealth legislation

AD/A320/22 - Thrust Reverser/ECU Electrical Harness Assemblies

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This Airworthiness Directive requires operators of Airbus A319/A320/A321 aircraft with CFM56‑5A engines (and holders of specified spare harnesses) to inspect certain thrust‑reverser/ECU electrical harness assemblies for moisture and corrosion and to install drainage modifications per Airbus AOT 71‑01. Operators must perform inspections and any corrective work within short, staged time limits. Operators pay for inspections, repairs and modifications; CASA enforces compliance and the rules affect installed harnesses and spares before installation.

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AD/A320/22 - Thrust Reverser/ECU Electrical Harness Assemblies

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/A320/22 Thrust Reverser/ECU Electrical Harness Assemblies 12/91

Applicability: 1. All A320 aircraft fitted with CFM56-5A engines and Electrical Harness Assemblies P/No 238W0908-511, 238W0904-509 and 238W0904-511.

All Electrical Harness Assemblies P/No 238W0908-511, 238W0904-509 and 238W0904-511 held as spares.

Requirement: 1. Action in accordance with Phase 1 of Airbus Industries All Operator Telex (AOT) 71-01.

Action in accordance with Phase 2 of Airbus Industries All Operator Telex (AOT) 71-01.

Note: Rohr Industries Service Bulletin RA32071-63 also refers.

Compliance: 1. For installed harnesses - prior to 100 hours’ Time in Service after 23 October 1991.

For harnesses held as spares - prior to installation on an aircraft.

For harness assemblies found during phase 1 to have moisture or corrosion present

- prior to exceeding 600 hours’ time in service after 23 October 1991.

For harness assemblies found during phase 1 to have no moisture or corrosion present - within 3000 hours’ time in service after 23 October 1991.

Background: One operator of A320 aircraft equipped with CFM56-5A powerplants has reported an uncommanded engine power reduction to idle in flight which has been partly attributed to corrosion in the ECU electrical harness. Compliance with this AD requires an inspection of the thrust reverser and ECU harness assemblies, for corrosion and moisture ingress, and the installation of draining provisions in the harness chafe guards.

Source text

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

1 AD/A320/22 - Thrust Reverser/ECU Electrical Harness Assemblies