Airworthiness Directive · Amendment 39-14182 · Boeing Model 777-200 and -300 Series Airplanes
Boeing Model 777-200 and -300 Series Airplanes
This AD applies to Boeing Model 777-200 and -300 series airplanes, certificated in any category; as listed in Boeing Special Attention Service Bulletin 777-57-0046, dated September 25, 2003.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires applying an anti-static conductive coating to the fuel access and thermal anti-icing blowout doors at the location of the bonding fasteners on the leading edge of the wings, and performing a resistance test on the new coating to ensure correct ground path resistance. This AD is prompted by a report that an anti-static coating was not applied correctly on doors located within a flammable fluid leakage zone. We are issuing this AD to prevent an uncontrollable fire in the leading edge of the wing, which could damage critical wing structures and cause a fuel tank explosion.
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 18 months after the effective date of this AD, apply an anti-static conductive coating to the fuel access and thermal anti-icing blowout doors at the location of the bonding fasteners, and perform a resistance test on the new coating, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-57-0046, dated September 25, 2003. Where Note (b) of Figures 1 and 2 of the Accomplishment Instructions of the service bulletin specifies to maintain the thickness of the conductive coating between 0.0004 and 0.0008 inch, this AD requires applying a uniform coating to avoid runs, sags, or wrinkles, and to ensure the anti-static coating touches the anti-static coating exposed during surface preparation.
(1) If the resistance measured between the door surface and a fastener located within the doors' surrounding support structure is within the limits specified in the service bulletin, no further action is required by this paragraph.
(2) If the resistance measured between the door surface and a fastener located within the doors' surrounding support structure is outside the limits specified in the service bulletin, before further flight, repeat the actions as required by paragraph (f) of this AD up to five times, as applicable. If the results of the fifth test exceed the limits specified in the service bulletin, before further flight, contact the Manager, Seattle Aircraft Certification Office (ACO), FAA, for disposition of repairs.
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
