Airworthiness Directive · Amendment 39-14157 · Boeing Model 747-400, -400D, -400F; 767-200, -300, -300F; and 777-200 and -300 Series Airplanes
Boeing Model 747-400, -400D, -400F; 767-200, -300, -300F; and 777-200 and -300 Series Airplanes
This AD applies to Boeing Model 747-400, -400D, and -400F series airplanes, line numbers 1 through 1276 inclusive; Model 767-200, -300, and -300F series airplanes, line numbers 1 through 850 inclusive; and Model 777-200 and -300 series airplanes, line numbers 1 through 360 inclusive; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-400, -400D, -400F; 767-200, -300, -300F; and 777-200 and -300 series airplanes. This AD requires installing a jumper wire between the wiring of the fire extinguisher switch and the fuel shutoff switch for each engine, and other specified actions. This AD is prompted by a certain combination of conditions, which could cause the fuel spar shutoff valves to remain partially open. We are issuing this AD to prevent a latent open circuit that could leave the fuel spar shutoff valve in a partially open position when the engine fire switch is activated, which could result in fuel from the engine feeding an uncontrolled fire in the engine or the strut.
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 jumper wire between the wiring of the fire extinguisher switch and the fuel shutoff switch for each engine, and do all other specified actions in the Accomplishment Instructions of Boeing Service Bulletin 747-28-2238, Revision 1, dated March 17, 2005 (for Model 747-400, -400D, and -400F series airplanes); Boeing Special Attention Service Bulletin 767-28-0066, Revision 1, dated May 29, 2003 (for Model 767-200, -300, and -300F series airplanes); or Boeing Service Bulletin 777-28-0025, Revision 1, dated March 17, 2005 (for Model 777-200 and -300 series airplanes); as applicable.
Accomplishment of the actions required by paragraph (f) of this AD before the effective date of this AD, in accordance with Boeing Special Attention Service Bulletin 747-28-2238, dated October 18, 2001; or 777-28-0025, dated January 10, 2002; as applicable; is considered acceptable for compliance with the corresponding action in paragraph (f) 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
