Airworthiness Directive · Amendment 39-17851 · Electrical power
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200 and -300 series airplanes, certificated in any category, as identified in Boeing Service Bulletin 777-24-0075, Revision 4, dated January 8, 2014.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of smoke or flames in the passenger cabin of various transport category airplanes related to the wiring for the passenger cabin in-flight entertainment (IFE) system, cabin lighting, and passenger seats. This AD requires installing wiring and making changes to certain electrical load management system (ELMS) panels and other concurrent requirements to ensure the flightcrew is able to turn off electrical power to the IFE systems and other non-essential electrical systems through one or two switches in the flight deck in the event of smoke or flames. In the event of smoke or flames in the airplane flight deck or passenger cabin, the flightcrew's inability to turn off electrical power to the IFE system and other non-essential electrical systems could result in the inability to control smoke or flames in the airplane flight deck or passenger cabin during a non- normal or emergency situation, and consequent loss of control of the airplane.
Within 60 months after the effective date of this AD, install certain wiring and make changes to certain electrical load management system (ELMS) panels; as identified in, and in accordance with, the Accomplishment Instructions of Boeing Service Bulletin 777-24-0075, Revision 4, dated January 8, 2014. Where the installation or change specifies installing a label, an operator's equivalent procedure to indelibly mark the applicable service bulletin number on the panel may be used.
Note 1 to paragraph (g) of this AD: Additional guidance on procedures for indelibly marking the ELMS panel can be found in Boeing Process Specification BAC5307.
(1) For airplanes identified in Boeing Service Bulletin 777-23-0142, dated November 25, 2003: Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, change the hardware and software for the cabin services system, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-23-0142, dated November 25, 2003.
(2) For all airplanes: Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, change the operational software (OPS) of the cabin management system, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-23-0175, Revision 2, dated October 12, 2006.
(3) For Group 1, Configurations 1, 3, and 4 airplanes, identified in Boeing Service Bulletin 777-24-0074, Revision 4, dated September 13, 2012: Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, install certain new electrical power control panels, as identified in, and in accordance with, the Accomplishment Instructions of Boeing Service Bulletin 777-24-0074, Revision 4, dated September 13, 2012.
(4) For Group 1, Configuration 2 airplanes, identified in Boeing Service Bulletin 777-24-0074, Revision 4, dated September 13, 2012: Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, inspect the electrical power control panel for a certain part number and change the part number, as applicable; as identified in, and in accordance with, the Accomplishment Instructions of Boeing Service Bulletin 777-24-0074, Revision 4, dated September 13, 2012.
(5) For all airplanes: Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, change the ELMS OPS and configuration database software (OPC) at the data loader, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-24-0087, Revision 2, dated August 16, 2007; or Boeing Service Bulletin 777-28A0039, Revision 2, dated September 20, 2010.
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.
