RIGHT AIR CONDITIONING COMPARTMENT
LIGHTING SWITCH FOR LIGHTING
NOSE
THE FORWARD
SWITCH FOR
LOWER NOSE WHEEL
CARGO COMPARTMENT
THE RIGHT AIR
COMPARTMENT WELL CONDITIONINGLIGHTING
LIGHTING COMPARTMENTSWITCH FOR
SWITCH FOR
THE ELECTRONIC
THE NOSE
COMPARTMENT WHEEL WELL
1
NOT INSTALLED ON ALL AIRPLANES
Cargo and Service Compartment Lights
Figure 1
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3.
4.
5.
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737-300/400/500MAINTENANCE MANUAL
2) LIGHT CIRCUIT WITH A RELAY; The module controls an other relay. If the relay, R31, is installed, it opens and closes the circuit for the forward cargo compartment lights. If the relay, R32, is installed, it opens and closes the circuit for the aft cargo compartment lights. Each relay is behind a sidewall panel that is immediately forward of the top of the cargo compartment door.
Air Conditioning Compartment Lights
___________________________________
A. Lighting in the right and left air conditioning compartments is supplied by floodlights.
(1)
There are floodlights in each compartment.
(2)
There is also a floodlight between the right and left compartments which supplies lighting to the two compartments at the same time. This floodlight is near the centerline of the airplane.
B. You use a toggle switch in each compartment to operate the floodlights in that compartment and the floodlight in the center.
(1)
The toggle switch is near the access door to each compartment.
(2)
The floodlight in the center will come on, if one of the two toggle switches is in the on position. This floodlight only will go off, if the two toggle switches are in the off position at the same time.
Wheel Well Lights
_________________
A. There is a dome light and a floodlight in each wheel well.
B. You can operate all the wheel well lights at the same time with a switch on the pilot's overhead panel, P5.
C. The lights in the wheel wells also can be operated independently.
(1)
There is a switch in the nose wheel well for its lights. The switch is on the external power receptacle, P19.
(2)
There is a switch on the forward side of the left main wheel well. This switch is for the operation of the lights in the right and left main wheel wells.
D. You must make the wheel well lights go off with the same switch you used
to make those lights come on.Electronic Compartment Lights
_____________________________
A. The lighting in the electronic compartment is supplied by dome lights.
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737-300/400/500MAINTENANCE MANUAL
B. You operate these lights with a toggle switch above the access door.
6. Lower Nose Compartment Lights_____________________________
A. Dome lights supply the lighting in the lower nose compartment.
B. You operate these lights with a toggle switch near the aft edge of the access door.
7. APU Compartment Light_____________________
A. In the APU compartment, lighting comes from a dome light that is
resistant to explosion.
B. You operate this light with a switch near the light.
8. Tail Cone Compartment Light___________________________
A. The lighting for the tail cone compartment is supplied with a dome light.
B. There is a lighting switch adjacent to the access door for this light.
9. Accessory Compartment Lights____________________________
A. Floodlights give lighting to the accessory compartment.
B. You operate these lights with a switch near the access door.
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