AD/B737/226 - Main Fuel Tank Aft Fuel Boost Pump Wiring (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 39.1 (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.

Boeing 737 Series Aeroplanes

AD/B737/226 Main Fuel Tank Aft Fuel Boost Pump Wiring 8/2004

Applicability: Model 737-600, 737-700, 737-700C, 737-800 and 737-900 series aeroplanes, as listed in Boeing Alert Service Bulletin (ASB) 737-28A1148, Revision 2, dated 18 December 2003.

Note 1: The term 'service bulletin', as used in this Directive, means the Accomplishment Instructions of Boeing Alert Service Bulletin 737-28A1148, Revision 2, dated 18 December 2003.

Requirement 1. For aeroplanes listed in the service bulletin as Groups 1, 2, 3 and 4 on which Boeing ASB 737-28A1148, dated 14 September 2000, has been accomplished and for aeroplanes listed in the service bulletin as Groups 5, 6 and 7 - Install screws and spacers to secure the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks in accordance with the service bulletin.

2. For aeroplanes listed in the service bulletin as Groups 1 and 2 on which Boeing ASB 737-28A1148, dated 14 September 2000, has not been accomplished - Perform a general visual inspection of the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks for chafing or other damage in accordance with the service bulletin.