Commonwealth legislation

AD/A320/97 Amdt 1 - Airborne Ground Check Module Modification

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legislative instrument

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This Airworthiness Directive requires operators of Airbus A319/A320/A321 aircraft that do not have Modification 27728 or 27189 to modify the Airborne Ground Check Module (AGCM) following Airbus Service Bulletin A320‑29‑1086 by 31 December 1999 (Requirement; Compliance). CASA issued the AD to address observed blockages of a low‑pressure check valve that could cause loss of the blue hydraulic system when the Ram Air Turbine is used (Background). Operators bear the cost and scheduling burden of the mandated modification.

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AD/A320/97 Amdt 1 - Airborne Ground Check Module Modification

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/A320/97

Amdt 1

Airborne Ground Check Module Modification 12/99

Applicability: All Airbus Industrie model A320 aircraft which do not have Modification 27728 or 27189 embodied.

Requirement: Modify the Airborne Ground Check Module (AGCM) in accordance with the instructions of AIRBUS INDUSTRIE Service Bulletin A320-29-1086.

Note: DGAC AD 98-537-124(B) R1 dated 22 September 1999 refers.

Compliance: Before 31 December 1999.

This Amendment becomes effective on 2 December 1999.

Background: During two in-flight events and during one functional check of the AGCM of the Ram Air Turbine, a blockage of the low pressure check valve was observed. Such a blockage could lead to the loss of the blue hydraulic system when using the Ram Air Turbine. This amendment introduces additional applicability criteria.

The original issue of this Airworthiness Directive became effective on 25 March 1999.

Source text

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

1 AD/A320/97 Amdt 1 - Airborne Ground Check Module Modification