AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/GAZELLE/23 and issues the following 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. Eurocopter SA341 and SA342 (Gazelle) Series Helicopters AD/GAZELLE/23 Amdt 1 Electric Hoist - Pyrotechnic Squib 8/2004 Applicability: SA 341 G or SA 342 J helicopters equipped with a 136kg (300 lb) emergency electric hoists, with part numbers (P/N) as follows, fitted with a junction box P/N 341A63- 1103-00: Hoist Manufacturer Breeze TRW (or Lucas or Air Equipment) Part Number BL 16-600, BL 16-600-11 and BL 16-600-12 76-370, 76-370-010 and 76-370-011 Requirement: Modify the junction box in accordance with paragraph 2.B. of either Eurocopter SA 341/342 Alert Telex 45.05 or Eurocopter SA 341/342 Alert Service Bulletin 45.05. Note: DGAC AD F-2002-370-043 R1 refers. Compliance: For helicopters equipped with Breeze hoists - Remains unchanged as 'Before the next flight with hoisting operations'. For helicopters equipped with TRW (or Lucas or Air Equipment) hoists - Remains unchanged as 'Within 12 months from the effective date of the original issue of this Directive or within 550 hours time in service after the effective date of the original issue of this directive, whichever occurs first; or before replacing a TRW (or Lucas or Air Equipment) hoist with a Breeze hoist'. For helicopters fitted with any of the affected hoists - Remains unchanged as 'Before installing or replacing a junction box with P/N 341A63-1103-00'. This Amendment becomes effective on 5 August 2004. Background: The French Direction Générale de L'Aviation Civile has advised that the electric hoist load jettison control system may not operate due to insufficient current to activate the pyrotechnic squib on Breeze hoist installations but is sufficient to operate squibs in TRW (or Lucas or Air Equipment) installations. Eurocopter SA341 and SA342 (Gazelle) Series Helicopters AD/GAZELLE/23 Amdt 1 (continued) The original issue of this Directive required modification of the hoist installation common electrical control circuitry. This Amendment has no effect other than to record the conversion of the alert telex to an alert service bulletin. The original issue of this Airworthiness Directive became effective on 12 July 2002. James Coyne Delegate of the Civil Aviation Safety Authority 23 June 2004 The above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.