*
Lens
*
Tab (4)
*
Lamp
*
Lever. You use the lever to lock the light in position.
Training Information Point
To get access to the lamp you:
*
Compress the bezel/lens retainer
*
Turn the retainer counterclockwise until the tabs align with the slots
*
Pull down.
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PASSENGER LOADING LIGHTS -DIRECT CEILING LIGHTS -INCANDESCENT
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PASSENGER LOADING LIGHTS -STANDBY LIGHT
Purpose
The standby light makes sure there is light when the ground service bus does not have power and the transfer buses have power.
Location
The standby lights are in some of the fluorescent direct ceiling and galley light assemblies. Their location is in areas that would not get light from the night lights.
See the passenger compartment illumination section for more information about the passenger compartment illumination night lights (SECTION 33-21).
There are no controls for the standby lights. They come on automatically when the ground service bus does not have power and the transfer buses have power.
Physical Description
The lamp is incandescent.
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777 AIRCRAFT MAINTENANCE MANUAL
PASSENGER LOADING LIGHTS -STANDBY LIGHT
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PASSENGER LOADING LIGHTS -FLIGHT DECK DOOR SWITCH
Purpose
The flight deck door switch controls the direct ceiling light immediately aft of the flight deck door.
General
If you open the flight deck door when the engines are running, the direct ceiling light immediately aft of the flight deck door goes off. The reflection on the flight displays would make them difficult to see.
Location
The switch is on the door post, above the door stop.
Physical Description
The switch is a magnetic-reed type switch.
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PASSENGER LOADING LIGHTS -FLIGHT DECK DOOR SWITCH
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PASSENGER LOADING LIGHTS -DIRECT CEILING LIGHTS -OPERATION
Operation
Controls for passenger loading direct ceiling lights are on the cabin lighting screen. This screen is on the cabin system control panel (CSCP) and the cabin area control panel (CACP).
See the passenger compartment illumination section for more information (SECTION 33-21).
The area select indicator lets you select the area of the cabin that the light mode selection will control. The configuration data base that is loaded in the cabin services system (CSS) supplies this information:
*
The area description name
*
The number of area segments.
There are four modes on the cabin lighting screen:
*
NIGHT
*
LOW
*
MEDIUM
*
HIGH.
The lights that operate in each mode is set by the configuration data base. A typical configuration has the direct ceiling lights on when the selected mode is LOW, MEDIUM, or HIGH.
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PASSENGER LOADING LIGHTS -DIRECT CEILING LIGHTS -OPERATION
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PASSENGER LOADING LIGHTS -DIRECT CEILING AND STANDBY LIGHTS -FUNCTIONAL DESCRIPTION
Functional Description
The configuration data base that is loaded in the cabin services system (CSS) sets the lights that come on in each selection.
Light selections made on the cabin area control panel (CACP) or cabin system control panel (CSCP) go directly to the zone management unit (ZMU).
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