AD/B767/164 - Oil Filter Differential Pressure Switch (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 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.

Boeing 767 Series Aeroplanes

AD/B767/164 Oil Filter Differential Pressure Switch 3/2002

Applicability: Model 767 series aeroplanes, as listed in Boeing Service Bulletin (SB) 767-79-0008 dated 11 August 1988 equipped with engine oil filter differential pressure switches on JT9D-7R4 engines and all Model 767 series aeroplanes with PW4000 engines equipped with engine oil filter differential pressure switches.

Requirement: 1. Replace the engine oil filter differential switch as follows:

1. For Pratt & Whitney PW4000 engines - Replace switch part number (P/N) S332T004-23 with a new -23 switch.

b. For Pratt & Whitney JT9D-7R4 engines - Replace switch P/Ns S332T004- 2, -25 or -29 with a new -29 switch.

Incorporation of switches P/N 21-SN04-403 or 21-SN04-415 in accordance with SB 767-79-0020 dated 14 November 1996 or Revision 1 dated 18 June 1998, as applicable, or P/N S332T004-32 in accordance with either SB 769- 79-0013 Revision 3 dated 7 January 1999 or Revision 4 dated 19 December 2001 is considered an alternate method of compliance to this Directive and terminating action for the Requirement 1.b. repetitive inspections.