Airworthiness Directive · Amendment 39-15211 · Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP Series Airplanes
Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP Series Airplanes
This AD applies to Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 747-57-2327, Revision 1, dated July 10, 2006; and Boeing Special Attention Service Bulletin 747-57-2326, dated January 4, 2007.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747- 300, 747-400, 747-400D, 747-400F, and 747SP series airplanes. This AD requires reconfiguring the clamps of certain wire bundles and applying insulating sealant to certain fasteners inside the fuel tanks. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent arcing inside the fuel tanks in the event of a lightning strike or high-powered short circuit, which could result in a fuel tank explosion or fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 60 months after the effective date of this AD, do the actions required by paragraphs (f)(1) and (f)(2) of this AD.
(1) Reconfigure the wire bundle clamps and seal the ends of certain fasteners inside the auxiliary fuel tank, main fuel tanks, and surge fuel tanks, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-57-2327, Revision 1, dated July 10, 2006.
(2) Seal the ends of certain fasteners inside the main fuel tanks, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-57-2326, dated January 4, 2007.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
