AD/B737/293 - Master Dim and Test System 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 39.001(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.

Boeing 737 Series Aeroplanes AD/B737/293 Master Dim and Test System Wiring 10/2006

Applicability: Model 737-300, -400 and -500 series aeroplanes identified in Boeing Special Attention Service Bulletin (SB) 737-33-1132, Revision 2, dated 8 September 2005; and Model 737-600, -700, -700C, -800 and -900 series aeroplanes identified in Boeing SB 737-33-1133, Revision 3, dated 8 September 2005. Requirement: 1. Modify the wiring for the master dim test system in accordance with the Accomplishment Instructions of Special Attention SB 737-33-1132, Revision 2 (for Model 737-300, -400 and -500 series aeroplanes) and SB 737-33-1133, Revision 3 (for Model 737-600, -700, -700C, -800 and -900 series aeroplanes), as applicable. 2. Accomplish the prior or concurrent actions specified in Table 1, as applicable. Table 1 - Prior and/or Concurrent Actions For: Accomplish all actions associated with: According to the Accomplishment Instructions of: Group 57 aeroplanes identified in Special Attention SB 737-33-1132, Revision 2 Installing an engine instrument system (EIS), and Boeing SB 737-77-1022, Revision 1, dated 26 October 1989 Modifying the advisory system for the EIS Boeing SB 737-77-1023, Revision 1, dated 9 November 1989 Group 37 and 46 aeroplanes identified in SB 737-33-1133, Revision 3 Installing wiring for the test system for the audio control panel lamp Boeing SB 737-33-1121, Revision 1, dated 19 December 2002 Group 2 aeroplanes identified in Boeing SB 737-33-1121, Revision 1 Installing splice SP896 Boeing Service Bulletin 737-26A1083, Revision 1, dated 15 November 2001