Document ID: chunk:federal_register_of_legislation:F2007L02145:body:0:p4
Version: federal_register_of_legislation:F2007L02145
Segment Type: other
Provision Reference: 
Character Range: 9578–12491

this AD.  For Groups 2 and 7 airplanes, the 7,000 total flight cycle inspection in new requirement 5 of this AD is an addition to the existing 7,000 total flight-cycle (flight limit) inspection.

      6. For Group 1 through 11 airplanes, conduct an internal detailed inspection for cracks of the left and right side body frames and 10 adjacent skin/tear straps between BS 440 and 520 inclusive and between stringers S-6 and S-12 inclusive, in accordance with Figures 11 through 16 of the Accomplishment Instructions of Boeing service bulletin BSB 747-53A2265 Revision 9.

   Note 8:  Accomplishment of the 13,000 total flight-cycle (flight limit) inspection required by existing requirement 2 of this AD is considered acceptable for compliance with the requirements of this paragraph.

   Note 9:  For Group 1 through 11 airplanes, the 10,000 total flight-cycle detailed inspection in new requirement 6 of this AD is in addition to the existing 10,000 total flight-cycle (flight limit) inspection in existing requirement 2.

      7. For Group 7 through 11 airplanes, conduct an internal surface HFEC inspection for cracks of the left and right side body frames between BS 420 and 460 inclusive and between stringers S-8 and S-12 inclusive, in accordance with Figures 12 through 16 of the Accomplishment Instructions of Boeing service bulletin BSB 747-53A2265 Revision 9.

   Note 10:  Accomplishment of the initial inspection required by new requirement 8 of this AD is considered acceptable for compliance with the initial inspection required by this paragraph.

   Note 11:  For Group 7 through 11 airplanes, the HFEC inspection in new requirement 7 of this AD is an addition to each of the flight limit inspections.

                8. For Group 7 through 11 airplanes, conduct an internal detailed and surface HFEC inspections for cracks of the body frames and adjacent skin between BS 420 and 460 inclusive and between stringers S-8 and S-12 inclusive, in accordance with Figure 17 of the Accomplishment Instructions of Boeing service bulletin BSB 747-53A2265 Revision 9.

             Note 12:  These inspections (New Requirement 8) are to be repeated at intervals not to exceed 1,000 flight cycles until the next flight limit inspection specified by requirement 7, of this AD.  These inspections (New Requirement 8) are to be conducted in between the flight limit inspections (New Requirement 7).

                9. In lieu of performing the repetitive detailed and surface HFEC inspections required by the new requirement 8 of this AD at intervals not to exceed 1,000 flight cycles, perform an internal detailed inspection for cracks of the body frame and adjacent skin between BS 420 and 460 inclusive and between stringers S-8 and S-12 inclusive, in accordance with Figure 17 of the Accomplishment Instructions of Boeing service bulletin BSB 747-53A2265 Revision 9.
Compliance:     1. Before