Airworthiness Directive · Amendment 39-17107 · Oxygen
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes; certificated in any category; as identified in Boeing Alert Service Bulletin 777-35A0027, Revision 1, dated April 19, 2012.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This AD was prompted by a report indicating that a fire originated near the first officer's area, which caused extensive damage to the flight deck. This AD requires replacing the low-pressure oxygen hoses with non-conductive low-pressure oxygen hoses in the flight compartment. We are issuing this AD to prevent electrical current from passing through the low-pressure oxygen hose internal anti-collapse spring, which can cause the low-pressure oxygen hose to melt or burn, and a consequent oxygen-fed fire in the flight compartment.
Within 18 months after the effective date of this AD: Replace the low-pressure oxygen hoses with non-conductive low-pressure oxygen hoses in the flight compartment, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-35A0027, dated December 15, 2011, or Boeing Alert Service Bulletin 777-35A0027, Revision 1, dated April 19, 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
