AD/ATR 42/2 Amdt 1 Fuel Tank Safety Electrical Wiring (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 42/2 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 42/2 Amdt 1 | Fuel Tank Safety - Electrical Wiring | 11/2007 |
Applicability: | ATR 42 aircraft, all models, all serial numbers, except aircraft that have received ATR modification 05355 during production (MSN 643 and subsequent) or ATR Service Bulletin (SB) ATR42-28-0039 Revision 3, dated 15 November 2006, or later revision approved by the European Aviation Safety Agency (EASA) whilst in service. |
Requirement: | 1. For ATR 42 aeroplanes not already modified in accordance with any previous revision of ATR SB ATR42-28-0039 - Modify the fuel system in accordance with ATR SB ATR42-28-0039 Revision 3 or later EASA approved revision. |
| 2. For ATR 42 aeroplanes already modified in accordance with any previous revision of ATR SB ATR42-28-0039: | |
| a. On aircraft in compliance with SB ATR42-28-0039 Revision 1: | |
| (i) Install all of the components delivered in the kit S280039A04. | |
| (ii) Perform additional works as detailed in the Transmittal Sheet of SB ATR42-28-0039 Revision 3. | |
| b. On aircraft in compliance with SB ATR42-28-0039 Revision 2 - Perform additional works as detailed in the Transmittal Sheet of SB ATR42-28-0039 Revision 3. | |
| Note: EASA AD 2007-0226 refers. | |
Compliance: | For Requirements 1 and 2 - Before 31 December 2009. |
| This Amendment becomes effective on 25 October 2007. |
Background: | Further to the accident of Boeing 747-131 (flight TWA 800), the United Sates Federal Aviation Administration (FAA) has published a set of new rules related to the fuel tank safety, including the Special Federal Aviation Regulation 88 (SFAR 88). The European Joint Aviation Authorities (JAA) has issued an Interim Policy JAA INT/POL 25/12, to recommend the application of a similar requirement to the National Aviation Authorities (NAA). This recommendation was followed by the French Direction Générale de l’Aviation Civile, which rendered compliance to JAA INT/POL 25/12 mandatory for all ATR Aircraft. |
| Under this regulation, all holders of type certificates are required to conduct a design review of their fuel tank systems against explosion risk. It also requires the development and implementation of maintenance and inspection instructions to maintain the safety of the fuel tank system. In following JAA INT/POL 25/12, and in accordance with SFAR 88 requirements and guidelines, ATR carried out a safety review on the fuel tank systems and zones adjacent to the fuel tanks on all ATR models using relevant safety assessment methods of JAR 25.1309. As a result of this safety review, ATR developed modification 05355 (SB | |
| Embodiment of this modification provided full compliance with JAR 25.1309 and eliminates the unsafe conditions in accordance with SFAR 88 and FAA AC | |
| The original issue of this Directive mandated modifications to the fuel system in accordance with ATR SB ATR42-28-0039 Revision 1. However, EASA has advised that installation kits for earlier service bulletins may have components missing or other discrepancies. Therefore, this Amendment required incorporation of the modification to the fuel system in accordance with SB ATR42-28-0039 Revision 3. | |
| The original issue of this Directive became effective on 2 August 2007. |
Charles Lenarcic
Delegate of the Civil Aviation Safety Authority
7 September 2007
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