Airworthiness Directive · Amendment 39-16826 · The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes
The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes
This AD applies to The Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes; certificated in any category; as identified in Boeing Service Bulletin 777-24-0102, Revision 1, dated June 17, 2010; and Boeing Special Attention Service Bulletin 777-29-0032, dated August 9, 2007.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires installing foreign object debris (FOD) rubber shields over the primary and secondary external power connectors for certain airplanes, and wrapping silicone tape around the hydraulic tube for certain other airplanes. This AD was prompted by a report of a fire in the main equipment center due to failure of an external power connector, which caused high-temperature arcing and subsequent splatter of molten copper on an adjacent hydraulic tube, creating a hole in the tube and spraying hydraulic fluid into the power connector, resulting in a fire. In addition there were several reports of overheating or arcing of external power connectors, and one report of a fire due to arcing caused by FOD. We are issuing this AD to prevent FOD from entering the primary and secondary external power connectors, which could result in overheating or arcing and consequent fire in the main equipment center.
Comply with this AD within the compliance times specified, unless already done.
Within 36 months after the effective date of this AD, do the actions required by paragraphs (g)(1) and (g)(2) of this AD.
(1) For airplanes identified in Boeing Service Bulletin 777-24-0102, Revision 1, dated June 17, 2010: Install FOD rubber shields over the primary and secondary external power connectors, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-24-0102, Revision 1, dated June 17, 2010.
(2) For airplanes identified in Boeing Special Attention Service Bulletin 777-29-0032, dated August 9, 2007: Wrap silicone tape around the hydraulic tube, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-29-0032, dated August 9, 2007.
Figure 1 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-29-0032, dated August 9, 2007, does not identify the units of the dimensions of the silicone tape installed on the hydraulic tube; those dimensions are identified in inches.
(i) Actions done before the effective date of this AD in accordance with Boeing Service Bulletin 777-24-0102, dated July 12, 2007, are acceptable for compliance with the corresponding requirements of paragraph (g)(1) of this AD.
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
