Document ID: chunk:federal_register_of_legislation:F2006B03095:body:0:p2
Version: federal_register_of_legislation:F2006B03095
Segment Type: other
Provision Reference: 
Character Range: 2805–5827

demonstrate that the inboard engines have never been located in the outboard position, perform a one-time general visual inspection to detect fuel leaks of the components between the fuel shutoff spar valve and the engine fuel shutoff valve on the outboard engines only, in accordance with the applicable section of Chapter 71 of the Boeing 747 Airplane Maintenance Manual (AMM) that pertains to the engines fitted to the aeroplane, or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8 1999. If any leak is detected, replace the part with a serviceable part. No further action is required by this AD.

4.    For aeroplanes with line number 1 through 628 inclusive, irrespective of engine type fitted; perform a one-time inspection of the maintenance records of the aeroplane to determine if the fuel shutoff spar valve for the left- and right-hand outboard engines has ever been replaced, in accordance with Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999.

                (a)     If the maintenance record inspection establishes that neither valve has been replaced, no further action is required by this AD.

                (b)     If either valve has been replaced, or if the maintenance record inspection does not clearly establish that neither valve has been replaced, accomplish paragraph 5(a), 5(b), or 5(c), as applicable.

5.    For aeroplanes with line number 629 through 1006 inclusive and powered by Pratt and Whitney engines, or for aeroplanes having line number 1 through 628 inclusive on which a fuel shutoff spar valve has been, or may have been, replaced; perform a one-time inspection to determine the part number of the fuel shutoff spar valve for the left-and right-hand outboard engines, as applicable, in accordance with Boeing Alert Service Bulletin 747-28A2199, dated August 1, 1996; Boeing Service Bulletin 747-28A2199, Revision 1, dated October 1, 1998; or Boeing Service Bulletin 747-28A2199, Revision 2, dated July 8, 1999.

                (a)     If a valve having P/N S343T003-40 (ITT P/N 125334D-1) is installed, no further action is required by this AD.

                (b) If a valve having P/N 60B92406-161 (ITT P/N 125334-1), P/N 60B92406-81 (ITT P/N 125120-1), or P/N 60B92406-201 (ITT P/N 107970-1) is installed,
                accomplish either paragraph 6. or 7. of this AD, as applicable.

                   (c) If a valve having P/N S343T003-40 (ITT P/N 125334D-1), P/N 60B92406- 161 (ITT P/N 125334-1), P/N 60B92406-81 (ITT P/N 125120-1), or P/N
                   60B92406-201 (ITT P/N 107970-1) is not installed, accomplish either paragraph 5.(c)(i) or 5.(c)(ii), and either paragraph 6. or 7. of this AD, as applicable.

                      (i)       Replace the valve with a new valve in accordance with the requirements of the service bulletin, or

                      (ii)     Modify the valve body assembly of the fuel system in accordance with the service bulletin.

                 6.    Except as provided in paragraph 7. of