Federal Register of Legislation - Australian Government

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AD/A330/73 - APU Generator Oil Pump Module

Authoritative Version
AD/A330/73 Airworthiness Directives/Pt 105 — Aircraft as made
APU Generator Oil Pump Module
Administered by: DOTARS
Exempt from sunsetting by the Legislative Instruments Act 2003 s 54(2) item 9
Registered 28 Mar 2007
Tabling HistoryDate
Tabled HR29-Mar-2007
Tabled Senate29-Mar-2007
Date of repeal 01 May 2007
Repealed by AD/A330/73 Amdt 1 - APU Generator Oil Pump Module

 

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Airbus Industrie A330 Series Aeroplanes

AD/A330/73

APU Generator Oil Pump Module

5/2007 TX

 

Applicability:

AIRBUS A330 series aircraft.

Requirement:

1.    Carry out a one-time inspection of the inlet screen (last chance filter) for the generator scavenge-oil pump for signs of debris and if necessary, apply the associated corrective actions, in accordance with the instructions of AIRBUS All Operators Telex (AOT) A330-24A3042 dated 22 March 2007 or later EASA approved revisions.

2.    Additional requirement for A330 Aircraft operating under MMEL item 24-22-01 “AC Main Generation” or MMEL item 36-11-01 “Bleed Air Supply System failure”:

Perform a check of the differential pressure indicator button on the lube filter and the generator scavenge filter in accordance with the instructions of AOT A330-24A3042 dated 22 March 2007 or later EASA approved revisions.

Note:  EASA Emergency Airworthiness Directive AD No.: 2007-0080-E dated
26 March 2007 refers.

Compliance:

1.    Unless already accomplished, no later than 22 April 2007.

2.    If applicable, before each flight.

 

This Airworthiness Directive becomes effective on 29 March 2007.

Background:

Two A330 operators have reported uncontained APU generator failures on ground.  In both events, a loud noise was heard, followed by an APU automatic shutdown.

Preliminary investigations confirmed an uncontained APU Generator failure with subsequent aircraft structural damage to the APU compartment and, in one case, to the stabiliser compartment.

Loose APU generator parts can lead to damage to the APU fire wall which might reduce its fire extinguishing capability, possibly leading to a temporary uncontrolled fire which constitutes an unsafe condition.  The root causes of both events are yet to be determined.

 

 

The aim of this telex AD is to mandate a one time inspection in order to get a complete fleet status.


Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

27 March 2007