Document ID: chunk:federal_register_of_legislation:F2006B03174:body:0:p1
Version: federal_register_of_legislation:F2006B03174
Segment Type: other
Provision Reference: 
Character Range: 20–3318

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 747 Series Aeroplanes

 AD/B747/278 Thrust Reversers 10/2002

 Applicability: Model 747 series aeroplanes equipped with Pratt & Whitney JT9D-70 series engines. Requirement:              1.              Inspect the thrust reverser wiring on each engine, in accordance with Boeing
              Alert Service Bulletin (ASB) 747-78A2149, Revision 1, dated 9 May 1996, or Revision 2, dated 29 August 1996, to detect any discrepancies.

              2.        Repair any discrepancy, detected during the Requirement 1 inspection, in accordance with ASB 747-78A2149, Revision 1 or Revision 2.

              3.        Accomplish the thrust reverser wiring modification on each engine in accordance with ASB 747-78A2149, Revision 1 or Revision 2.

              4.        Accomplish the modification of the thrust reverser control system wiring specified in Rohr Service Bulletin (SB) TBC-CNS 78-32, Revision 1, dated 20 August 1996.

              5.        Perform an operational test of the thrust reverser wiring on each engine to detect discrepancies in accordance with ASB 747-78A2149, Revision 1 or Revision 2.

              6.        Rectify any discrepancy, detected during the Requirement 5 operational test, in accordance with ASB 747-78A2149 Revision 1 or Revision 2.

              7.        Perform the following inspections and tests of the thrust reverser control and indication system to detect discrepancies in accordance with Boeing ASB 747- 78A2159, dated 18 May 1995:

                   1. Inspect in accordance with Part III, "1,000 Flight Hour Inspections" of the ASB Accomplishment Instructions.

                   2. Inspect and test in accordance with Part III, "18 Month Thrust Reverser System Checks" of the ASB Accomplishment Instructions.

              Accomplishment of Requirements 9, 10 and 11 constitutes terminating action for the Requirement 7 repetitive inspections and tests.

              8.        If any Requirement 7 inspection or test required cannot be successfully performed as specified in the referenced service bulletin, or if any discrepancy is detected during any inspection or test, repair in accordance with ASB 747- 78A2159. Additionally, any failed inspection or test must be repeated and successfully accomplished.

              9.        Install an additional locking system on each engine thrust reverser in accordance with the Accomplishment Instructions of Boeing SB 747-78-2153, Revision 1, dated 27 November 1996.

              10.    Accomplish the installation of provisional wiring for the locking system on the thrust reversers in accordance with Boeing