Airworthiness Directives; Boeing Model 767-300 Series Airplanes Modified by Supplemental Type Certificate SA5765NM or SA5978NM

This amendment adopts a new airworthiness directive (AD), applicable to all Boeing Model 767-300 series airplanes modified by supplemental type certificate (STC) SA5765NM or SA5978NM, that requires removal or modification of the in-flight entertainment (IFE) system installed by those STCs. This action is necessary to prevent the inability of the flight crew to remove power from the IFE system when necessary. Inability to remove power from the IFE system during a non- normal or emergency situation could result in inability to control smoke or fumes in the airplane flight deck or cabin. This action is intended to address the identified unsafe condition.