Airworthiness Directive · Amendment 39-16613 · Wings
The Boeing Company Model 757 Airplanes
This AD applies to all The Boeing Company Model 757-200, -200CB, -200PF, and -300 series airplanes, certificated in any category.
We are superseding an existing airworthiness directive (AD) for the products listed above. That AD currently requires sealing the fasteners on the front and rear spars inside the left and right main fuel tanks and on the rear spar and lower panel of the center fuel tank. That AD also requires inspections of the wire bundle support installations to verify if certain clamps are installed and if Teflon sleeving covers the wire bundles inside the left and right equipment cooling system bays, on the left and right rear spars, and on the left and right front spars; and corrective actions if necessary. This new AD also requires sealing the additional fasteners on the rear spar inside the left and right main fuel tanks. This AD was prompted by a fuel system review conducted by the manufacturer. We have received reports from the manufacturer that additional fasteners in the main fuel tanks must be sealed for lightning strike protection. We are issuing this AD to detect and correct improper wire bundle support installation and sleeving and to prevent improperly sealed fasteners in the main and center fuel tanks from becoming an ignition source, in the event of a fault current or lightning strike, which could result in a fuel tank explosion and consequent loss of the airplane.
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 December 30, 2008 (the effective date of AD 2008-23-19), seal the applicable fasteners and do the general visual inspections of the wire bundle support installations, and do all the applicable corrective actions before further flight, by accomplishing all of the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 757-57A0064, dated July 16, 2007; or Part 1 through Part 10 of the Work Instructions of Boeing Alert Service Bulletin 757-57A0064, Revision 1, dated October 5, 2009. As of the effective date of this AD, only Boeing Alert Service Bulletin 757-57A0064, Revision 1, dated October 5, 2009, may be used.
For airplanes on which the actions in Boeing Alert Service Bulletin 757-57A0064, dated July 16, 2007, were accomplished before the effective date of this AD: Within 60 months after the effective date of this AD, seal the fasteners on the rear spar inside the left and right main fuel tanks, in accordance with Part 11 of the Work Instructions of Boeing Alert Service Bulletin 757-57A0064, Revision 1, dated October 5, 2009.
(i) Where Boeing Alert Service Bulletin 757-57A0064, Revision 1, dated October 5, 2009, describes the use of lacing tape BMS 13-54, Type III, Class 1, Finish C, Black, this AD also allows the use of lacing tape BMS 13-54, Type III, Class 1, Finish C, White, as an alternative.
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
