Airworthiness Directives; The Boeing Company Model 777-200 Series Airplanes

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We propose to adopt a new airworthiness directive (AD) for certain Model 777-200 series airplanes. This proposed AD would require installing a new circuit breaker, relays, and wiring to allow the flightcrew to turn off electrical power to the in-flight entertainment (IFE) systems and other non-essential electrical systems through a switch in the flight compartment, and doing other specified actions. The actions include replacing the cabin area control panels; changing the wiring; modifying the purser station or the A-4 galley, as applicable; installing new cabin system management unit, cabin area control panel, overhead electronics unit, and zone management units operational software, as applicable; and making a change to the cabin services system (CSS) configuration database and installing the new database in the CSS components. This proposed AD would also require changing the wiring at the cabin management system in the purser station. This proposed AD results from an IFE systems review. We are proposing this AD to ensure that the flightcrew is able to turn off electrical power to the IFE system and other non-essential electrical systems through a switch in the flight compartment