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庞巴迪挑战者605公务机机组操作手册 CL605-燃油系统 FUEL SYSTEM(8)

时间:2011-10-29 10:55来源:蓝天飞行翻译 作者:公务机
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 FUEL SYSTEM Description  Vol. 2  12.10.13 
Oct 05/06 


Fuel Transfer Schematic Legend
Figure 12.10.10

 

 FUEL SYSTEM Description  Vol. 2  12.10.14 
Oct 05/06 


Fuel Transfer Schematic
Figure 12.10.11

 

 FUEL SYSTEM Description  Vol. 2  12.10.15 
Oct 05/06 

Fuel Dumping
If attempts to transfer fuel from the tail tank to the auxiliary tank fail, the tail tank fuel can be dumped. Fuel dumping must be carried out with the flaps at 0°.
A guarded DUMP switch/light, powered by the DC battery bus, is located on the FUEL control panel. Once pressed in, the dump valve is commanded open, and the white OPEN indicator illuminates on the switch/light. Fuel is dumped at a rate of approximately 100–120 lb/min (45–55 kg/min). Five minutes after the dump valve is selected OPEN, the DUMP VALVE OPEN caution EICAS message is displayed, to remind the flight crew that the dump valve is open.
If the dump valve is not in the position commanded by the switch/light, the amber FAIL indicator will illuminate, and the TAIL DUMP SOV caution EICAS message will be displayed.

Fuel DUMP Switch/Light Figure 12.10.12


NOTE
Fuel may be inadvertently dumped on the ground, via the fuel dump mast, if the BATT MASTER switch is selected on, and the fuel DUMP switch is pressed in.
Fuel Crossflow (XFLOW)
Whenever there is a fuel imbalance between the two main tanks (more than 400 lb on taxi, takeoff or landing, or more than 800 lb in flight), the FUEL IMBALANCE caution EICAS message is displayed.
The three XFLOW switch/lights on the FUEL control panel correspond to three valves in the crossflow line. The motorized gate-valves, located in the auxiliary tank, are powered by 28 VDC. Pushing one of the XFLOW switch/lights allows manual fuel transfer between the designated tanks.


NOTE
The FUEL IMBALANCE caution message will be triggered in flight whenever more than 400 lb fuel imbalance exists between the left and right main tanks, and flaps are set at 20-degree position or more.


 FUEL SYSTEM Description  Vol. 2  12.10.16 
Oct 05/06 


XFLOW Switch/Lights
Figure 12.10.13

L (R) TO AUX XFLOW Switch/Lights
Pushing the L (R) TO AUX XFLOW switch/light opens a valve which allows fuel flow from the selected wing tank into the auxiliary tank. Fuel is then evenly distributed by the transfer ejectors to both LEFT and RIGHT main tanks. When the fuel imbalance reduces to less than 100 lb after a 50-second time delay, the FUEL XFLOW SOV OPEN caution EICAS message will be displayed, to remind the crew to deselect the appropriate XFLOW switch/light.


NOTE
An electric switch interlock inhibits simultaneous opening of both L TO AUX and R TO AUX valves.
 
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