AD/B737/159 - Engine Fuel Shutoff Valve Wiring (Cth)

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

Boeing 737 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/B737/159 Engine Fuel Shutoff Valve Wiring 9/2001

Applicability: The following models and series of aeroplanes as listed in the Service Bulletins (SB) below:

Aeroplane Model Boeing Special Attention Service Bulletin

737-300, 737-400, 737-500 737-28-1164, dated 24 August 2000.

737-600, 737-700, 737-800 737-28-1160, Revision 1, dated 26 October 2000.

Requirement: 1. Perform a test to determine if there is continuity or to measure voltage, as applicable, of the two electrical circuits that close the fuel shutoff valve on the wing spar. Carry out the test in accordance with Special Attention SB 737-28- 1164 or SB 737-28-1164, Revision 1, dated 10 May 2001 (for Model 737-300, 737-400, and 737-500 series aeroplanes); or Special Attention SB 737-28-1160, Revision 1 (for Model 737-600, 737-700, and 737-800 series aeroplanes).

2. For Model 737-300, 737-400 and 737-500 series aeroplanes - If any discontinuity is detected, repair the discontinuity in accordance with SB 737-28- 1164.