Document ID: chunk:federal_register_of_legislation:F2007L02145:body:0:p1
Version: federal_register_of_legislation:F2007L02145
Segment Type: other
Provision Reference: 
Character Range: 0–3180

AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/B747/46 Amdt 6 and issues the following AD under subregulation 39.001(1) of CASR 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/B747/46 Amdt 7  Forward Fuselage Pressure Shell  8/2007

Applicability:  B747 aircraft, line positions 1 to 685, (aircraft built prior to August 1987) in 6 Groups:
                Group  Description
                1      747 line numbers 1-87
                2      747 line numbers 88-603 (Not including SUD and nose cargo door airplanes)
                3      747 line numbers 604-661 (Not including SUD and nose cargo door airplanes)
                4      747 line numbers 662-672 (Not including SUD and nose cargo door airplanes)
                5      747 line numbers 673-678 (Not including SUD and nose cargo door airplanes)
                6      747 line numbers 679-685 (Not including SUD and nose cargo door airplanes)
                7      747 SUD and nose cargo door airplanes, line numbers 88-603
                8      747 SUD and nose cargo door airplanes, line numbers 604-661
                9      747 SUD and nose cargo door airplanes, line numbers 662-672
                10     747 SUD and nose cargo door airplanes, line numbers 673-678
                11     747 SUD and nose cargo door airplanes, line numbers 679-685

                (applicability is as defined by Boeing Service Bulletin 747-53A2265, Revision 9)

Requirement:     1. Accomplish an external detailed visual inspection for cracked skin or loose or missing fasteners of the body skin between BS 420 and BS 460 inclusive and between stringers S-8 and S-12 inclusive on the left and right sides of the aircraft and accomplish any necessary corrective actions, in accordance with the technical requirements of Boeing Service Bulletin 747-53A2265 Revision 9.

              Note 1:  Requirement 1 is the requirement formerly contained in AD/B747/324, which has now been transferred to this AD.  AD/B747/324 has now been cancelled.

                 2. Conduct a close detailed visual inspection (refer Boeing S/B 747-53A2265 Revision 7) of the interior structure of the pressure shell, including the junction of the floor beams with the fuselage frames, and in addition, conduct an external detailed visual inspection of the skin at the fuselage frame fasteners, at and within the following areas, left hand and right hand, and at the following times, with the following partial exemptions:

                 * Group 1 aircraft are exempt from the 7000 flights inspection.

                 * Group