曝光台 注意防骗
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LIGHTS - EMERGENCY LIGHTS - POWER SUPPLIES
LIGHTS - EMERGENCY LIGHTS - POWER SUPPLIES
EFFECTIVITY
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
33-51-00-005
Operation
You use the emergency exit light switch on the P5 forward
overhead panel or the emergency exit switch on the attendant
panel. These switches control the emergency lights. The
emergency exit light switch on the P5 panel has these positions:
* ON - makes emergency lights come on
* OFF - prevents automatic operation
* ARM - prepares system for automatic operation.
The NOT ARMED and MASTER CAUTION lights are on when
the emergency light switch on the P5 panel is in the ON or the
OFF positions. The 28V DC bus 1 supplies power to these
indication lights.
The emergency exit switch on the attendant panel has two
positions, ON and NORMAL. The ON position makes the
emergency lights come on. The NORMAL position sets
automatic operation. The attendant panel switch will cause
the lights to come on even if the P5 switch is OFF.
Functional Description
The power supplies use 28v dc for their charge and control logic
circuits. The charge circuits charge the battery packs when
these conditions occur:
* P5 emergency exit light switch is in the OFF or ARM position
* 28v dc bus 1 has power
* Attendant panel emergency exit light switch is in the
NORMAL position.
When the P5 switch is in the ARM position, the power supply
makes the emergency lights come on when one of these
conditions occur:
* Attendant panel emergency exit switch is in the ON position.
* 28v dc bus 1 power drops less than 12 volts.
Training Information Point
If you remove all power from the airplane, the P5 emergency
exit light switch must be in the OFF position and the attendant
switch in the NORM position. This prevents the emergency
lights operation so the batteries do not discharge. Each power
supply contains a battery test switch. If you push this switch, the
emergency lights connected to its power supply circuit will
come on for one minute.
Each power supply provides power to its series of emergency
lights. When a power supply voltage goes low, the emergency
lights in that circuit go off. The emergency lights operate for
more than 10 minutes. When the 28v dc bus 1 has power and the
emergency light switches on the P5 panel and the attendant
panel are not ON, the battery packs are on charge. The time to
fully charge the battery packs depends on the time that the
emergency lights were on.
LIGHTS - EMERGENCY LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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LIGHTS - EMERGENCY LIGHTS - FUNCTIONAL DESCRIPTION
LIGHTS - EMERGENCY LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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CHAPTER
35
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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