Document ID: chunk:federal_register_of_legislation:F2006B03101:body:0:p2
Version: federal_register_of_legislation:F2006B03101
Segment Type: other
Provision Reference: 
Character Range: 2847–5868

the body fuel tank components that are described in Revision 1 of SB 747-28-2205. Regardless of which version of the service bulletin is used to detect any discrepancies, the repair and replacement requirements of this Directive apply.

4.         For aeroplanes listed in Boeing Alert Service Bulletin (ASB) 747-28A2208 dated 14 May 1998, accomplish the following in accordance with either ASB 747- 28A2208 dated 14 May 1988 or Revision 1 dated 26 August 1999:

                  1. perform a one-time insulation resistance test of the fuel quantity indicating system (FQIS),

                 b.         perform a one-time visual inspection of the FQIS wiring and components to detect discrepancies (chafing, damage to the wiring and incorrect configuration of the terminal blocks),

                 c.         replace FQIS probes (tank units and compensators) with new or serviceable components as detailed in Figure 5 of either ASB 747-28A2208 dated 14 May 1988 or Revision 1 dated 26 August 1999, and

                 d.         carry out a system adjustment and system operational test.

            Note 3: Aeroplanes required to accomplish Requirement 4 of this Directive are exempt from accomplishing steps 1 through 9 in Figure 11 of SB 747-28-2205,
            Revision 1, dated 16 April 1998.

            Note 4: For aeroplanes on which steps 1 through 9 in Figure 11 of SB 747-28-2205,
            dated 27 June 1997, or Revision 1, dated 16 April 1998, were accomplished prior to the effective date of this Directive, steps 1 through 6 in Figure 16 of ASB
            747-28A2208, dated 14 May 1998 or Revision 1 dated 26 August 1999, are not required.

5.         If, during the Requirement 4 inspections and/or tests, any discrepancy is detected perform corrective actions in accordance with either ASB 747-28A2208 dated 14 May 1998 or Revision 1 dated 26 August 1999.

6.         For aeroplanes having line positions 1 through 971 inclusive, install a flame arrestor in the inlet line of the electrical motor-operated scavenge pump of the centre fuel tank, in accordance with ASB 747-22A2210 dated 14 May 1998.

            Note 5: FAA AD 99-08-02 R1 Amdt 39-11215, AMOC 99-140S-177 dated 17 May
            1999 and AMOC 99-140S-282 dated 11 August 1999 refer.

 Compliance: 1. Within 24 months after the effective date of the original issue of this Directive.

2.         Before further flight.

3.         Before further flight.

4.         Within 24 months after the effective date of the original issue of this Directive.

5.         Before further flight.

            6.        Within 24 months after the effective date of the original issue of this Directive. This Amendment becomes effective on 23 December 2004.
            Background: This Directive is based on Federal Aviation Administration AD 99-08-02, the issue of which was prompted by a design review and testing results obtained in support of an accident investigation. The Directive is intended to remove ignition sources from the