Airworthiness Directive · Amendment 39-14617 · 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 identified in Boeing Service Bulletin 777-52-0033, Revision 1, dated June 12, 2003.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires replacing the battery packs of the emergency power assist system (EPAS) of the left and right non-overwing exit doors with new or modified battery packs. This AD results from intermittent failures of the EPAS battery pack found during testing, which are due to switch contamination, cam alignment problems, and inadequate self-test capability. We are issuing this AD to prevent failure of the EPAS, which could result in the inability to open the exit door during an emergency evacuation.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For Group 1 airplanes, as identified in Boeing Service Bulletin 777-52-0033, Revision 1, dated June 12, 2003: Within 24 months after the effective date of this AD, replace the battery packs of the EPAS of the left and right non-overwing exit doors with new battery packs by doing all the actions specified in Boeing Service Bulletin 777-52-0033, Revision 1, dated June 12, 2003.
For Group 2 airplanes, as identified in Boeing Service Bulletin 777-52-0033, Revision 1, dated June 12, 2003: Within 24 months after the effective date of this AD, accomplish the actions specified in either paragraph (g)(1) or (g)(2) of this AD.
(1) Replace the battery packs as required by paragraph (f) of this AD.
(2) Modify the battery packs by doing all the actions specified in Boeing Component Service Bulletin 285W0955-24-01, dated November 21, 2002.
Accomplishing the applicable actions required by paragraph (f) or (g) of this AD before the effective date of this AD, in accordance with Boeing Special Attention Service Bulletin 777-52-0033, dated November 21, 2002, is considered acceptable for compliance with the corresponding actions in this AD. Part number (P/N) S906-10207-2 (for a 9-volt alkaline battery), shown in Paragraph 2.C.2. of that service bulletin, is not a valid P/N; the correct P/N that must be used is P/N S906-10135-8011.
(i) As of the effective date of this AD, no person may install a EPAS battery pack, P/N S283W203-1 or P/N 285W0955-101, on any airplane.
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
