K82806
Passenger Loading LightsFeb 20/87 Figure 1 33-28-0 Page 3/4BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
535 Work and Closet Lights Simplified Schematics
Feb 20/85 Figure 2 33-28-0
Page 5
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PASSENGER LOADING LIGHTS - MAINTENANCE PRACTICES
EFFECTIVITY
ATI INTERIOR
1. General
A. The following procedures provide steps for relamping the fluorescent entry lights, for testing the attendant’s work lights and the threshold lights.
2. Relamp Fluorescent Entry Lights
A. Provide electrical power (Ref 24-22-0, MP).
B. Turn lights on by positioning ENTRY switch on applicable attendant’s panel to BRT.
C. Identify faulty lights, and place ENTRY switch to OFF.
D. Open ENTRY BRT LIGHTS circuit breakers on P18-3 panel.
(1)
Insert allen wrench into two holes of entry light ceiling panel and push upward to unlatch. Lower ceiling panel until restrained by lanyard.
(2)
Press PUSH button which locks tube at one end and remove lamp.
WARNING: OBSERVE SAFETY PRECAUTIONS WHEN HANDLING FLUORESCENT LAMPS. BROKEN LAMPS MAY CAUSE INJURY.
(3)
Replace lamp.
(4)
Secure lanyard and raise entry light ceiling panel assembly to latch.
E. Close ENTRY BRT LIGHTS circuit breaker.
F. Position ENTRY rotary switch on applicable attendants panel to BRT. Verify that light comes on bright.
G. Remove electrical power if no longer required (Ref 24-22-0,MP).
3. Test Attendants Work Lights and Threshold Lights
A. Provide electrical power (Ref 24-22-0, MP).
B. Ensure following circuit breakers are closed on P18-3 panel.
(1)
ENTRY BRT LIGHTS
(2)
ENTRY/WORK/THSHD
C. For work light, position WORK switch on applicable attendant’s panel to ON. Check that light comes on, then turn light off.
D. For threshold light, position rotary ENTRY switch to BRT on applicable attendant’s panel. Check that light comes on then turn ENTRY light switch to OFF.
E. Remove electrical power if no longer required (Ref 24-22-0, MP).
Feb 20/85 33-28-0 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
CARGO AND SERVICE COMPARTMENT LIGHTING - DESCRIPTION AND OPERATION
1. General
A. Cargo and service compartment lights provide illumination for the areas and compartments beneath the cabin floor of the fuselage and in the aft accessory, auxiliary power unit, and tail cone compartments as illustrated in Fig. 1. Single switches adjacent to lights are used except for cargo and wheel well lights. All lights use incandescent lamps. The 28-volt ac ground service bus supplies electrical power through circuit breaker panel P18.
2. Cargo Compartment Lights
A. The forward and aft cargo compartments each are illuminated by dome lights mounted in the ceiling and a single spotlight in the upper door frame. The 28-volt ac ground service bus provides electrical power for dome light operation. Normal cargo compartment light control is provided by a switch located adjacent to the forward edge of each cargo door frame. When set to ON with the cargo door open, the cargo light switch connects 28 volts ac through the normally closed contacts of the cargo light relay to turn the lights on. When the cargo door is closed, the cargo light relay energizes to disable the switch circuit (Fig. 2).
B. The forward cargo compartment light relay (R31) is located in the sidewall just forward of the door and slightly below top of door. Access to relay (R31) is by removing the applicable sidewall panel. The aft cargo compartment light relay (R32) is located in the sidewall just forward of the cargo door. Access to relay (R32) is by removing sidewall panel adjacent to the forward edge of the aft cargo door (Ref 25-52-123, Cargo Compartment Sidewall Lining -Removal/Installation).
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