AD/A330/98 Fuel Pump Non Return Valve (Cth)
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/A330/98 | Fuel Pump Non Return Valve | 2/2009 |
Applicability: | AIRBUS (formerly AIRBUS INDUSTRIE) A330 aircraft, models -201, -202, -203, |
Requirement: | 1. Perform an operational test for correct functioning of the Non Return Valve (NRV) and apply the associated corrective actions in accordance with AIRBUS Service Bulletin (SB) A330-28-3108. 2. Repeat the operational test detailed in Requirement 1of this AD. 3. The results of the operational tests required by this AD, whatever they are, must be reported to AIRBUS. The use of later approved revisions of these documents is acceptable for compliance with the requirements of this AD. Note: EASA AD 2008-0209 dated 27 November 2008 refers. |
Compliance: | For Requirement 1 - Whichever occurs later between (a) or (b) (a) Before accumulating 10,000 total Flight Hours (FH) from the first flight of the aircraft; or (b) Within 2 years or 8,000 FH from the effective date of this AD, whichever occurs first. For Requirement 2 - At intervals not exceeding 10,000 FH. For Requirement 3 - Within 1 month from the test accomplishment date. |
| This Airworthiness Directive becomes effective on 12 February 2009. | |
Background: | An A340 operator has reported an uncommanded engine N°4 shut down during taxi after landing. The root cause of this event has been identified as failure of the fuel pump NRV preventing the collector cell jet pump from working. This led to engine N°4 collector cell fuel level to drop below the pump inlet and consequently causing engine N°4 flame out. |
| A330 aircraft which have a similar design are also impacted by this issue. Multiple NRV failures in combination with failure modes trapping fuel could potentially increase the quantity of unusable fuel on aircraft possibly leading to fuel starvation which could result in engine in-flight shut down and would constitute an unsafe condition. To prevent such an event, this AD requires a periodic operational test to check the correct operation of NRV and to apply the associated corrective actions. |
James Coyne
Delegate of the Civil Aviation Safety Authority
22 December 2008
0
0
0