AD/ATR 42/19 Amdt 2 Fuel Tank Safety Fuel Airworthiness Limitations (Cth)
AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ATR 42/19 Amdt 1 and issues the following 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.
Avions de Transport Regional ATR 42 Series Aeroplanes
| AD/ATR 42/19 Amdt 2 | Fuel Tank Safety Fuel Airworthiness Limitations | 1/2009 |
Applicability: | ATR 42-200, -300, -320, -400 and -500 series aeroplanes. |
Requirement: | 1. Maintenance/Inspection Tasks - |
| a. Fuel Airworthiness Limitations (FAL) identified in ‘Appendix A - Time Limits’ in the following ATR42 Maintenance Review Board Reports (MRBR) are to be completed at the time intervals and as specified in that document with the exception of the task listed in Requirement 1.b. of this Directive: | |
| (i) For ATR 42-200, -300 and -320 aeroplanes - Revision 7 dated March 2006, and | |
| (ii) For ATR 42-400 and -500 aeroplanes - Revision 6 dated March 2007. | |
| b. Carry out the task “Detailed Visual Inspection of the fuel tanks and associated equipment, wiring, piping and braids” - Certification Maintenance Requirement (CMR) task reference 28.10.00-1. | |
| Defined intervals for the FALs are to be counted from the effective date of the original issue of this Directive or from the date of the first flight of the aircraft whichever occurs later. | |
| 2. Critical Design Control Configuration Limitations (CDCCL) - The operator shall ensure that their internal documentation is amended to reflect the data contained within the CDCCL section of the applicable MRBR and to provide appropriate text to highlight the existence of each CDCCL. The operator’s internal procedures and documentation ensuring management of control of CDCCL shall be fully implemented. | |
| Later Revisions of the above documents approved by the European Aviation Safety Agency (EASA) are acceptable for compliance with this requirement. | |
| Note 1: ATR All Operator Message AOM 42-72/2007/05 Issue 4 dated 8 August 2008 and ATR Service Letter ATR42-28-5004 dated 23 March 2007 contain additional information regarding the above requirements. |
| Note 2: EASA AD 2006-0219R2 refers. | |
Compliance: | For Requirement 1.a. - Within three months after the effective date of the original issue of this Directive. |
| For Requirement 1.b. - Either: | |
| (i) Within 12.5 years since new (ie date of aircraft manufacture), or | |
| (ii) Within six years after the effective date of the original issue of this Directive, or | |
| (iii) Within 20 000 hours time in service after the effective date of the original issue of this Directive, | |
| whichever occurs first. | |
| For Requirement 2 - Remains unchanged as “Before 27 December 2007”. | |
| This Amendment becomes effective on 15 January 2009. | |
Background: | Subsequent to accidents involving Fuel Tank System explosions in flight and on the ground, the United States Federal Aviation Administration (FAA) published Special Federal Aviation Regulation 88 (SFAR 88) in June 2001. SFAR 88 required a safety review of the aircraft Fuel Tank System to determine that the design meets the requirements of FAR § 25.901 and § 25.981(a) and (b). A similar regulation has been recommended by the European Joint Aviation Authorities (JAA) to the European National Aviation Authorities in JAA letter 04/00/02/07/03-L024 of 3 February 2003. The review was requested to be mandated by European National Airworthiness Authorities using JAR § 25.901(c), § 25.1309. In August 2005 the EASA published a policy statement on the process for developing instructions for maintenance and inspection of Fuel Tank System ignition source prevention (see that also included the EASA expectations with regard to compliance times of the corrective actions on the unsafe and the not unsafe part of the harmonised design review results. On a global scale the Type Certificate (TC) holders committed themselves to the EASA published compliance dates (see the EASA policy statement). The EASA policy statement was revised in March 2006 resetting the date of 31 December 2005 for the unsafe related actions to 1 July 2006. |
| FAL are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an ‘unsafe condition’ as defined in FAA Memo |
| The original issue of this Directive mandated the Fuel System Airworthiness Limitations comprising maintenance/inspection tasks and critical design control configuration limitations for ATR 42 series aeroplanes, that resulted from the design reviews and the JAA recommendation and EASA policy statement mentioned above. |
| Amendment 1 continued that mandate but more closely aligned the compliance options to those of the EASA. The Amendment also referenced a new issue of ATR AOM 42/72/2007/05 as providing more information on fuel tank safety. |
| This Amendment deletes the reference to the Maintenance Planning Document (MPD), notifies of the last Certification Maintenance Requirements (CMR) task reference and description, and updates the CMR interval which is extended to 12.5 years from 12 years, as indicated in the revised Time-Limits documents published by the Type Certificate Holder and approved by EASA for ATR 42 series aircraft. The Amendment also revises the internet link for EASA policy statements and includes a reference to a revised issue of ATR AOM 42/72/2007/05. |
| The original issue of this Directive became effective on 27 September 2007. |
| Amendment 1 to this Directive became effective on 21 September 2007. |
James Coyne
Delegate of the Civil Aviation Safety Authority
28 November 2008
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