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庞巴迪挑战者605公务机机组操作手册 CL605-防火 FIRE_PROTECTION(4)

时间:2011-10-28 11:46来源:蓝天飞行翻译 作者:公务机
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ENGINE FIRE/OVERHEAT PROTECTION (CONT'D)
BOTTLE 1 (2) ARMED PUSH TO DISCH Switch/Lights
When an illuminated BOTTLE 1 (2) ARMED PUSH TO DISCH switch/light is pressed, electrical current fires the squibs in the associated bottle, and pressurized Halon is directed into the engine nacelle. The selection of the LH or RH ENG FIRE PUSH switch/light will determine which engine nacelle will receive the extinguishing agent.

Glareshield Panels Figure 09.10.4
Miscellaneous Test Panel
The engine fire/overheat protection system may be tested from the miscellaneous test panel, located on the forward pedestal. The FIRE DET WARN/FAIL switch provides the means of testing the fire/overheat detection system, by selectively simulating fire/overheat conditions and fail conditions.
Selecting the switch to the WARN position verifies the continuity of all the sensing elements, and bottle charge status. Selecting the switch to the FAIL position verifies the ability of the detection control units to discriminate between an actual overheat/fire and false fire (shorted) loops.
The FIREX MONITOR 1 (2) (APU) TEST switches provide a means for the flight crew to test the respective squib circuitry continuity.

Miscellaneous Test Panel
Figure 09.10.5

 

 FIRE PROTECTION Description  Vol. 2  09.10.6 
Oct 05/06 

AUXILIARY POWER UNIT FIRE/OVERHEAT PROTECTION
Description
The APU fire detection system is used to detect an overheat/fire condition within the APU enclosure. The fire detection system continuously monitors the APU. If a fire or overheat condition is detected, the APU will automatically shut down, and an EICAS message, as well as an aural and visual warning, will occur. The APU fire extinguishing system consists of one fire extinguisher bottle.
Components and Operation
Heat-Sensing Elements
The APU is protected by one continuous heat-sensing element (loop), installed within the APU enclosure. This sensing element is connected to the APU fire detection control unit. Operation of the sensing element is identical to the engine fire detection system.

APU Fire Detection
Figure 09.10.6

 

 FIRE PROTECTION Description  Vol. 2  09.10.7 
Oct 05/06 

AUXILIARY POWER UNIT FIRE/OVERHEAT PROTECTION (CONT'D)
Fire Detection Control Unit
The APU has a dedicated fire detection control unit, which continuously monitors the resistance of its own loop. When the electrical resistance decreases to the warning trip point, the unit produces a fire warning signal to the EICAS, which causes the following aural and visual warnings to occur:
.  
APU FIRE warning EICAS message is displayed;

.  
MASTER WARNING switch/lights illuminate flashing;

.  
Fire bell sounds; and

.  
APU FIRE PUSH switch/light illuminates.


The APU will also shut down automatically.
 
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