S 862-009
(3) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
LANDING, RUNWAY TURNOFF, AND NOSE GEAR TAXI LIGHTS - DESCRIPTION AND OPERATION
______________________________________________________________________________
1. General_______
A. Landing and runway turnoff lights are adjusted to give good lighting when landing or turning on the runway. These lights are controlled with switches on the pilots' overhead panel (P5).
B. For more data about this lighting system, refer to these sources:
(1)
SSM 33-40-01
(2)
WDM 33-42-01
(3)
WDM 33-45-01
2. Inboard Landing Lights______________________
A. Two inboard landing lights are in the wing leading edges near the fuselage. The lamps shine forward and down to the ground ahead of the airplanes.
B. Power is supplied from the 115 volt ac buses No.1 and 2 through step-down transformers. Step-down transformers T43 and T44 provide an output of 28 volts ac for the operation of the lights.
3. Outboard Landing Lights_______________________
A. A retractable landing light is on each outboard flap track fairing. The lamps shine forward parallel to the centerline of the airplane.
B. The outboard landing lights get electrical power from the same source as the inboard landing lights.
C. The outboard landing lights are controlled by a three position switch on the pilots' P5 overhead panel. The switch positions are RETRACT, EXTEND and ON. The switch design eliminates the possibility of the lights being turned on while in the RETRACT position. The switch must be moved from RETRACT to the EXTEND position before the lights can be turned on.
4. Runway Turnoff Lights_____________________
A. Two runway turn-off lights are adjacent to and inboard of the inboard fixed landing lights. The lamps shine outward approximately 30 degrees, and have a beam width of 50 degrees.
B. Power to the runway turnoff lights is supplied from the 28 volt ac buses No.1 and 2.
C. The lights are individually controlled by switches on the pilots' P5 overhead panel.
5. Nose Gear Taxi Light____________________
A. The nose gear taxi light is installed on a bracket on the inner cylinder of the nose gear shock strut. The nose gear taxi light turns with the nose gear wheels so they are always aligned together. The light is controlled by a switch on the pilot's overhead panel (P5).
B. The 28 volts ac of electrical power for the taxi light comes from the No.1 bus through a circuit breaker on P18.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
INBOARD LANDING
TURN-OFF LIGHT BEAM
INBOARD LANDING
Landing and Turn-Off Lights
Figure 1
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
LANDING, RUNWAY TURNOFF AND NOSE GEAR TAXI LIGHTS - TROUBLE SHOOTING
____________________________________________________________________
1. General
_______
CAUTION: LANDING LIGHTS ARE NOT DESIGNED FOR CONTINUOUS USE IN STILL AIR.
_______
LIMIT OPERATION TO MOMENTARY USE.
A. Trouble shooting the landing and runway turn-off lights is easily accomplished independent of any other tests or functions. Trouble shooting will require that power be available and appropriate circuit breakers be closed. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 灯 LIGHTS(54)
