Airworthiness Directive · Amendment 39-12693 · Boeing Model 777-200 and -300 Series Airplanes
Boeing Model 777-200 and -300 Series Airplanes
Model 777-200 and -300 series airplanes, as listed in Boeing Alert Service Bulletin 777-35A0010, dated October 4, 2001; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777-200 and -300 series airplanes. This action requires replacement of the switch guard on the switch used to control the passenger and/or therapeutic oxygen system with a new, improved switch guard. This action is necessary to prevent displacement of the passenger/therapeutic oxygen switch, which could result in the unavailability of supplemental/therapeutic oxygen and possible incapacitation of passengers during flight. This action is intended to address the identified unsafe condition.
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.
