527 Passenger Reading Lights Schematic
Nov 15/71 Figure 5 33-21-01
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Passenger Information Signs Simplified Schematic 527
33-21-01 Figure 6 Aug 15/72
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514 Lavatory Lights Schematic
Nov 01/75 Figure 7 33-21-01
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10. Attendant's Work Lights
A. The forward attendant's work light is located on the passenger cabin left sidewall above the forward entry door and is controlled by a switch on the forward attendant's panel (Fig. 1).
B. On Standard Passenger Airplanes, an aft attendant's work light is located overhead in the lowered ceiling near the galley light and is controlled by a switch on the aft attendant's panel (Fig. 1).
C. Power for the work lights is 28 volts ac from load control center P18.
11. Airstair Lights
A. Two tread lights are mounted under the forward lower edge of each step of the airstairs. The lamps are powered by 28 volts through circuit breakers on the P6 panel.
B. The AIRSTAIR three-position toggle switch on the adjacent attendant's panel provides control. The three switch positions are ON, OFF, and AUTO. The ON switch turns the airstairs lights on independent of airstair position. The OF F position disables the circuit. With the switch set to AUTO, an airstair extend limit switch is connected in series with the switch on the attendants' panel. The extend limit switch will turn the airstair lights on whenever the airstairs are fully extended and turn the lights off when the airstairs are retracted. (See figure 9.)
12 Main Cargo Door Floodlights (Passenger/Cargo Convertible Airplanes)
A. There are four cargo door floodlights in the main passenger cabin ceiling and a pair of threshold lights at the main cargo door which are controlled by the cargo door lights switch on the main cargo door control panel. Power to the cargo door and threshold lights is only available when the cargo door is open, thus energizing the cargo door floodlights relay.
B. Power for these lights and relay is 28 volts ac from the 28-volt ac ground service bus through the MAIN CARGO DOOR FLOOD LIGHTS circuit breaker on panel P18.
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33-21-01 Page 14 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/72
527 Galley Lights Schematic
Nov 15/71 Figure 8 33-21-01
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
K83397
Airstairs Lights Simplified Schematic 533
33-21-01 Figure 9 Aug 15/72
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PASSENGER COMPARTMENT LIGHTING – TROUBLE SHOOTING
1. General
A. Trouble shooting the passenger compartment lighting is accomplished independent of any other tests or functions. Trouble shooting requires that power is available and appropriate circuit breakers closed.
B. Trouble shooting procedures are based on the assumption that wiring is OK and electrical power available. If corrective action in procedure does not correct problem, check wiring using wiring diagram.
2. Passenger Compartment Lighting Trouble Shooting Chart
A. Ceiling Lights
TROUBLE PROBABLE CAUSE ISOLATION PROCEDURE REMEDY
One night light inoperative Failed lamp or lamp holder assembly Relamp or replace lamp holder
501
Nov 15/78 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 33-21-01 Page 101
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