PASSENGER COMPARTMENT ILLUMINATION -SIDEWALL LIGHTS

Purpose
The sidewall lights give fluorescent lighting below the stowage bins in the passenger compartment.
Location
The lights are under the outboard stowage bins, between the outboard PSUs and the sidewall panels.
Physical Description
Each sidewall light has these components:
*
Ballast

*
Fluorescent lamp

*
Lens.

The length of the light is in proportion to the length of the stowage bin it is under.
Training Information Point
You squeeze the lens to remove it.
NOTE: The ballast for the indirect ceiling light or sidewall light is part of the light assembly. If the ballast does not operate, replace the light assembly. The light assembly can be repaired in a shop.
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PASSENGER COMPARTMENT ILLUMINATION -SIDEWALL LIGHTS

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PASSENGER COMPARTMENT ILLUMINATION -OPERATION

Operation Training Information Point
Controls for passenger compartment illumination are on the You can test cabin lighting elements from the Lamp Tests
cabin lighting screen. This screen is on the Cabin System screen on the CSCP.
Control Panel (CSCP) and the Cabin Area Control Panel
(CACP).

The area select indicator in the screen 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 lighting information:

*
Name for each area

*
The number of area segments.

*
Lighting Controls

The four light modes are:
*
NIGHT

*
LOW

*
MEDIUM

*
HIGH.

The configuration data base also sets the lights that operate in each mode. The following is a typical configuration:
*
NIGHT: only night light comes on

*
LOW: only indirect ceiling lights come on dim

*
MEDIUM: indirect ceiling and sidewall lights come on dim

*
HIGH: indirect ceiling and sidewall lights come on bright.

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PASSENGER COMPARTMENT ILLUMINATION -FUNCTIONAL DESCRIPTION

Functional Description
The Configuration Data Base (CDB) is loaded into the Cabin Services System (CSS). It contains information that defines the number of areas and the lights that come on for each area.
Lighting selections made on the Cabin Area Control Panel (CACP) or Cabin System Control Panel (CSCP) go directly to the Zone Management Unit (ZMU).
The ZMU has the logic from the configuration data base. It uses the logic to tell the OEU what light to set on and the level of that light.
See the cabin services system section for more information (SECTION 23-39).
See the passenger service system section for more information about the OEU (SECTION 23-33).
Power for the indirect ceiling and sidewall lights is from the ground service bus. These lights come on bright when the ground service bus gets power. They will stay on bright until the ZMU gets power from the transfer bus and another selection is made.
EFFECTIVITY
BEJ ALL

The ELMS (not shown) uses the ARINC 629 buses to make the indirect ceiling and sidewall lights come on bright when the passenger oxygen masks are deployed. They stay on bright until the oxygen system is reset.
The direct ceiling lights operate the same when passenger oxygen is deployed.
These lights operate the same when passenger oxygen is deployed:
*
Fluorescent direct ceiling

*
Entry.

See the passenger loading lights section for more information about the direct ceiling passenger loading lights (SECTION 33-22).
See the passenger oxygen system section for more information (SECTION 35-21).
The transfer buses must have power for the night lights to operate. The night lights come on automatically if the ground service bus loses power and the transfer bus has power.
The standby lights also come on automatically if the ground service bus loses power and the transfer bus has power.
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PASSENGER COMPARTMENT ILLUMINATION -FUNCTIONAL DESCRIPTION
　
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