AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/A330/21 and issues the following AD under subregulation 39.1 (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/A330/21
Amdt 1
Low Pressure Fuel Shut-Off Valve 12/2003
Applicability: Airbus A330-201, -202, -203, -223, -243, -301, -321, -322, -323, -341, -342 and -343
series aeroplanes, all serial numbers, fitted with low-pressure fuel shut-off valve (LPSOV) part number (P/N) HTE190021 or HTE190026.
Requirement: 1. Unless already accomplished, carry out the following in accordance with instructions in Airbus Industrie Service Bulletin (SB) A330-28-3083 dated 25 March 2003:
- Remove the LPSOV twin motor actuator (TMA).
b. Carry out an inspection of the TMA pedestal in accordance with paragraph
3.C (2) and the flowchart of the SB.
c. Measure the distance between the face of the mounting flange and the top of the locating pin in accordance with paragraph 3.C (3) of the SB. If the distance is lower than or equal to 1.08 mm no further action is necessary.
2. If the Requirement 1.c. measurement determines that distance between the face of the mounting flange and the top of the locating pin is greater than 1.08 mm, replace the TMA in accordance with SB A330-28-3083.
3. A TMA with P/N HTE190021 or HTE190026 may not be installed on any aeroplane, as a replacement part, unless Requirement 1.c. has been accomplished.
Note: DGAC AD 2003-359(B) refers.
Compliance: For Requirement 1 - Remains unchanged as ‘Within 16,000 hours time in service or within 53 calendar months after the effective date of the original issue of this Directive, whichever occurs first.
For Requirement 2 - Before the next flight after the Requirement 1.c. measurement. For Requirement 3 - As of the effective date of this Directive.
This Amendment becomes effective on 27 November 2003.
Airbus Industrie A330 Series Aeroplanes
AD/A330/21 Amdt 1 (continued)
Background: During an unscheduled maintenance engine run on an A340 aeroplane, the Fire Push Button Switch was operated but the number 4 engine continued to run for approximately six minutes until shut down by other means. No ECAM warning was triggered and despite the fuel system display indicated a closed position for the LPSOV, the valve was not fully closed.
The valve assembly subsequently operated correctly following replacement of the fuel shut-off valve together with the associated pedestal assembly and the TMA.
Investigations by the supplier of the TMA showed that the locating pin of the TMA and the locating slot in the pedestal had been damaged. It was also found that in some instances, due to manufacturing tolerances, it is possible to install the TMA and the pedestal with an incorrectly aligned locating pin.
The original issue of this Directive corrected a potential unsafe condition by requiring a check of the locating pin length and an inspection of the pedestal for damage. The Directive also prohibited the installation of TMAs with certain part numbers unless they had been inspected.
This Amendment continues the requirements of the original issue, but expands the applicability to include aircraft with Airbus Modification 48225 incorporated during production as LPSOVs with P/N FRH010041 may have been replaced during service with either P/N HTE190021 or HTE190026.
The original issue of this Airworthiness Directive became effective 2 October 2003.
Jim Coyne
Delegate of the Civil Aviation Safety Authority 13 October 2003
The above AD is notified in the Commonwealth of Australia Gazette on 5 November 2003.
Overview
The Civil Aviation Safety Authority Act 1998, enacted to ensure the safety of civil aviation, addresses specific safety concerns and mandates compliance with airworthiness standards. The Civil Aviation Safety Authority (CASA) has issued Airworthiness Directive (AD) AD/A330/21 Amendment 1 to rectify an unsafe condition identified in Airbus A330 series aeroplanes. This directive applies to all Airbus A330-201, -202, -203, -223, -243, -301, -321, -322, -323, -341, -342, and -343 series aeroplanes fitted with low-pressure fuel shut-off valve (LPSOV) part numbers HTE190021 or HTE190026. The directive mandates the removal and inspection of the LPSOV twin motor actuator (TMA) and, if necessary, its replacement. The directive also prohibits the installation of TMAs with certain part numbers unless they have been inspected and found compliant. This action is necessary to ensure that any manufacturing tolerances or damage do not compromise the safe operation of the aircraft. The compliance deadlines are set to ensure that the necessary checks and replacements are carried out in a timely manner to maintain airworthiness.
Scope and Application
The Airworthiness Directive AD/A330/21, issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Safety Regulations 1998, applies specifically to Airbus A330-201, -202, -203, -223, -243, -301, -321, -322, -323, -341, -342 and -343 series aeroplanes, all serial numbers, that are fitted with low-pressure fuel shut-off valve (LPSOV) part numbers HTE190021 or HTE190026. This directive mandates certain actions to be undertaken to address a recognised unsafe condition concerning the low-pressure fuel shut-off valve twin motor actuator (TMA). The directive requires the removal of the TMA, inspection of the TMA pedestal, and measurement of the distance between the face of the mounting flange and the top of the locating pin. Depending on the measurement, the TMA may need to be replaced. The directive also prohibits the installation of TMAs with certain part numbers unless they have been inspected and found compliant. The compliance timelines vary, with some actions required within 16,000 hours time in service or 53 calendar months from the original issue date, and others before the next flight after the measurement, or immediately upon the directive's effective date. The directive applies across the Commonwealth of Australia and is enforceable through CASA's regulatory powers.
Key Provisions
The Airworthiness Directive (AD) AD/A330/21 Amdt 1, issued by the Civil Aviation Safety Authority (CASA) delegate, pertains specifically to the Airbus A330 series aeroplanes equipped with certain low-pressure fuel shut-off valve (LPSOV) parts. This directive applies to Airbus A330-201, -202, -203, -223, -243, -301, -321, -322, -323, -341, -342 and -343 series aeroplanes, all serial numbers, fitted with LPSOV part numbers HTE190021 or HTE190026 (section 1). The directive revokes the previous AD AD/A330/21 and includes updated requirements aimed at ensuring airworthiness. The primary action required is the removal and inspection of the LPSOV twin motor actuator (TMA) as per Airbus Industrie Service Bulletin (SB) A330-28-3083 dated 25 March 2003. If the distance between the face of the mounting flange and the top of the locating pin is found to be 1.08 mm or less, no further action is necessary. However, if the distance exceeds 1.08 mm, the TMA must be replaced (section 1). Additionally, TMAs with the specified part numbers may not be installed unless the measurement requirement has been fulfilled (section 1).
The AD imposes several obligations on the parties and entities it governs. Firstly, the directive mandates the removal and inspection of the TMA as per the specified instructions in the Airbus Industrie Service Bulletin (section 1). Secondly, it requires that any TMA with the specified part numbers not be installed unless the distance measurement criterion has been met (section 1). Furthermore, compliance deadlines are specified, requiring certain actions to be completed within 16,000 hours of time in service or within 53 calendar months from the original issue date of the directive, whichever is earlier (section 3). For specific measurements, compliance must occur before the next flight after the measurement is taken, and for installation prohibitions, compliance must be immediate upon the directive's effective date (section 3).
Failure to comply with the requirements of the AD may result in various consequences. The AD does not explicitly outline specific penalties or consequences for non-compliance; however, non-compliance with ADs generally could result in the aircraft being deemed unairworthy. This could lead to grounding of the aircraft, which has significant operational and financial implications for the operator. Additionally, regulatory authorities may impose administrative penalties or take enforcement actions against the operator for non-compliance with airworthiness directives. The specific penalties would depend on the jurisdiction and the severity of the non-compliance.