AD/G1159/42 - DC Essential Bus Indication (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.

Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes

AD/G1159/42 DC Essential Bus Indication 8/2004

Applicability: Model G-IV series aeroplanes, serial numbers 1000 through 1359 inclusive. Requirement: 1. For aeroplanes equipped with the SPZ 8400 Digital Integrated Flight Control System, accomplish the following, as applicable:

1. If the aeroplane has the production equivalent of Gulfstream IV Aircraft Service Change (ASC) 327, install the new indicator light and the audible tone, in accordance with Gulfstream GIV Customer Bulletin 102B, dated 26 January 2004, together with Modification Instructions A, J through L, and P through S of Gulfstream IV ASC 327B, dated 26 January 2000.

b. If the aeroplane has Gulfstream IV ASC 327 installed, but not Gulfstream IV ASC 327A, install the new indicator light and the audible tone, in accordance with Gulfstream GIV Customer Bulletin 102B; Modification Instructions A through H of Gulfstream GIV ASC 327B Am2, dated 26 January 2004; and Modification Instruction P of Gulfstream IV ASC 327B.

Note 1: Modification Instruction E in Gulfstream GIV ASC 327B Am2 is the same as Modification Instruction P in Gulfstream IV ASC 327B.