Airworthiness Directive · Amendment 39-14505 · Boeing Model 777-200 Series Airplanes
Boeing Model 777-200 Series Airplanes
This AD applies to Boeing Model 777-200 series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 777-28-0045, dated September 1, 2005.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 series airplanes. This AD requires installing a new washer between the lower wing surface and the jam nut of the sump drain valve assembly. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent energy from a lightning strike on the bushing for the sump drain valve from arcing to the inside of the center fuel tank wall, which could create an ignition source in the fuel tank and result in 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 60 months after the effective date of this AD, install a new washer between the lower wing surface and the jam nut of the sump drain valve assembly in both wings, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-28-0045, dated September 1, 2005.
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
