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. Hose Assemblies AD/HOSE/8 Titeflex Hoses 7/2004 Applicability: Titeflex Corporation hoses installed on, but not limited to, Boeing 737-300, -400, -500, -600, -700, -700C, -800, -900, 747-400, 757-200, -300, 767-200, - 300, and -300F aeroplanes. Requirement: 1. Inspect the manufacture date code on all hoses listed in Table 1 of this Directive. Use the Accomplishment Instructions of the applicable Boeing alert service bulletins (ASB) contained in Table 1 of this Directive. 2. If the manufacture date is 11/99 through 1/01 and there is a permanent white dot on the ID band, no further action is required for that hose. 3. If the hose manufacture date code is 11/99 through 1/01 inclusive and there is no permanent white dot on the ID band, replace the hose with a serviceable hose or perform an indirect conductive inspection/test for proper heat treat. Use the accomplishment instructions of the applicable ASB listed in Table 1 of this AD. 4. Replace the hose with a serviceable hose if any B-nut is improperly heat-treated. Table 1. --Applicable Hose P/Ns Aeroplane model Boeing hose P/N Titeflex PMA P/N Used for Applicable alert service bulletin (1) 737-300, - S312N512-5 113701-5 Engine and 737-26A1108, 400, and -500 S312N512-6 113701-6 cargo Revision 1, aeroplanes. BACH5R0110YP compartment dated June 27, BACH5S0110XN fire 2002. extinguishing bottles. (2) 737-600, - S316A001-1 115398-1 Engine, 737-26A1109, 700,-700C, - S316A001-2 115398-2 auxiliary Revision 2, 800, -900 S312N512-15 113701-15 power unit dated May 8, aeroplanes. S312N512-17 113701-17 (APU), and 2003. S312N512-18 113701-18 cargo BACH5R0110YP compartment BACH5S0110XN and fire extinguishing bottles, and wing-to- strut fuel hoses. (3) 747-400 BACH5R0080YY Forward 747-26A2269, aeroplanes BACH5R0140YU cargo and Revision 1, BACH5S0140XT main deck dated June 6, BACH5R0186YY cargo 2002. BACH5R0186XX compartment BACH5S0080XX fire extin- BACH5S0110XN guishing bottles. (4) 757-200 S312N512-1 113701-1 Engine, APU, 757-26A0043, aeroplanes S312N512-2 113701-2 and cargo Revision 1, S312N512-3 113701-3 compartment dated S312N512-4 113701-4 fire November 14, BACH5R0110YP extinguishing 2002. BACH5S0110XN bottles. No Number 109422 (5) 757-300 S312N512-1 113701-1 Engine and 757-26A0044, aeroplanes S312N512-2 113701-2 cargo Revision 1, S312N512-3 113701-3 compartment dated S312N512-4 113701-4 fire November 14, BACH5R0110YP extinguishing 2002. BACH5S0074XN bottles. Optional 453N2240-33 (6) 767-200, - BACH5R0085YU Cargo 767-26A0121, 300, and - BACH5R0140YU compartment dated 300F BACH5S0077XT fire December 19, aeroplanes. BACH5S0140XT extinguishing 2001. BACH5S0184XX bottles. BACH5R0127YY Note: FAA AD 2003-23-05 Amdt 39-13369 refers. Compliance: For Requirements 1, 2, and 3: Unless previously inspected in accordance with ASB 737-26A1108, dated November 15, 2001, ASB 737-26A1109, dated November 15, 2001, ASB 737-26A1109, Revision 1, dated November 7, 2002, ASB 747-26A2269, dated November 1, 2001, ASB 757-26A0043, dated November 15, 2001, and ASB 757-26A0044, dated November 15, 2001, within 24 months from the effective date of this Directive. For Requirement 4: Before further flight following the inspections detailed in Requirement 3 of this Directive. This Airworthiness Directive becomes effective on 8 July 2004. Background: Certain Titeflex Corporation hoses discovered with incorrect heat treatment of B-nuts prompt this Directive that is issued to prevent fire extinguishing system and fuel system hose failure due to improperly heat-treated aluminium B-nuts. James Coyne Delegate of the Civil Aviation Safety Authority 28 May 2004 The above AD is notified in the Commonwealth of Australia Gazette on 16 June 2004.