Boeing 777: Emergency Light, Service Interphone, Passenger Oxygen and Window Heat

777 Window Heat, Emergency Light, Service Interphone & Passenger Oxygen by jerome meriweather
	Maintenance OverHead Glareshield Forward Pedestal
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777 Photo and/or Graphic Element

Cockpit Emergency Light Control
All switch positions allow Emergency Lights battery packs to be charged from DC power. However, charging rate with the switch on is insufficient to maintain the battery packs charge.

OFF - Prevents Emergency Lights system operation if airplane electrical power fails or is turned off.
ARMED - All Emergency Lights illuminate automatically with the loss of DC power.
ON - All Emergency Lights illuminate.

Passenger Oxygen and Light

Switch (Guarded) - Pushing the switch causes Passenger Cabin Oxygen masks to drop.
Light - Indicates Passenger Oxygen System is operating and the masks have dropped.

Window Heat Switches

ON - Heat is applied to selected windows.
INOP - Comes on to indicate one of the following conditions:
- Overheat
- System fault
- Switch is selected off

Service Interphone Switch

OFF - Allows independent operation of the Service and Flight Interphone Systems.
ON Connects the Service and Flight Interphone System.