Airworthiness Directive · Amendment 39-17099 · Equipment/furnishings
the Boeing Company Airplanes
(1) This AD applies to The Boeing Company Model 777-200, -200LR, and -300ER series airplanes; certificated in any category; as identified in Boeing Special Attention Service Bulletin 777-25-0482, Revision 1, dated February 21, 2012.
We are adopting a new airworthiness directive (AD) for certain the Boeing Company Model 777-200, -200LR, and -300ER series airplanes. This AD was prompted by a report from the manufacturer indicating that the lowered ceiling support structure of Section 41, in airplanes incorporating the overhead space utilization (OSU) option, was found to be under-strength when subjected to a 9.0 g forward load. This AD requires installing new structural members, tie rod(s), and attach fittings on the left and right sides of the lowered ceiling support structure. We are issuing this AD to prevent the forward lowered ceiling panels and support structure from becoming dislodged during a 9.0 g forward load and consequent injury to personnel or interference with an emergency evacuation.
Within 60 months after the effective date of this AD, install new structural members and new tie rod(s) and attach fittings on the left and right sides of the lowered ceiling support structure, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-25-0482, Revision 1, dated February 21, 2012.
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
