AD/B747/233 - Horizontal Stabiliser Fuel Tank Wire Bundles (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Boeing 747 Series Aeroplanes

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 CAR 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.

AD/B747/233 Horizontal Stabiliser Fuel Tank Wire Bundles 10/2000

Applicability: Model 747-400 series aeroplanes having line numbers (L/N) 1162 through 1223, except L/N 1174; equipped with horizontal stabiliser fuel tanks.

Requirement: 1. Perform a one-time detailed visual inspection in accordance with Boeing Alert Service Bulletin (ASB) 747-28A2232, Revision 1, dated 22 June 2000 of wire bundles routed to the fuel tank transfer pumps in the horizontal stabiliser to determine if wire bundles W4601 and W4602 are routed correctly and to detect damage. If the wire bundles are routed correctly and no damage is detected, no further action is required by this Directive.

2. If either wire bundle is determined to be incorrectly routed, but damage is not detected, reroute the affected wire bundle in accordance with the ASB.

3. If any damage is detected (whether the wire bundles are routed properly or not), repair the affected wire bundle and route the wire bundle correctly, as applicable, in accordance with the ASB.