Commonwealth legislation

AD/A320/34 - Braking System Electrical Relays

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legislative instrument

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This Directive requires operators of Airbus A319/A320/A321 aeroplanes that have not received Airbus modification 23611 to replace two braking‑system relays (24GG and 25GG) with overvoltage‑protected units, following Airbus Service Bulletin A320‑32‑1115 (16 June 1993). The stated aim is to reduce Braking/Steering Control Unit (BSCU) failures caused by voltage peaks. Operators must complete the replacement by 30 September 1994 and therefore bear the parts, labour and scheduling costs of the mandated maintenance.

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AD/A320/34 - Braking System Electrical Relays

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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 Airbus Industrie A319, A320 and A321 Series Aeroplanes

AD/A320/34 Braking System Electrical Relays 13/93

Applicability: All A320 series aeroplanes without Airbus Industrie modification 23611. Requirement: Action in accordance with Airbus Industrie Service Bulletin A320-32-1115 dated

16 June 1993.

Note: DGAC AD 93-163-043(B) dated 29 September 1993 refers.

Compliance: Prior to 30 September 1994.

Background: Airbus Industrie has received reports of Braking/Steering Control Unit (BSCU) failures being caused by voltage peaks on relays 24GG and 25GG. This Directive mandates the replacement of both relays with overvoltage protected relays, thus decreasing the probability of BSCU failure. The DGAC compliance date is extended by one calendar month.

Source text

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