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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(6)

时间:2011-10-29 10:55来源:蓝天飞行翻译 作者:公务机
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Wash Filter
The wash filters are installed along the motive flow fuel feed lines, from the engine-driven pump to the main and scavenge ejector pumps. The wash filter separates ice crystals, which may have formed in the fuel, and channels them to the larger main ejector pump, thus protecting the smaller scavenge ejector pump from possible clogging. There are no cockpit indications associated with wash filter operation.


 FUEL SYSTEM Description  Vol. 2  12.10.9 
Oct 05/06 


Fuel Distribution Schematic Legend
Figure 12.10.7

 

 FUEL SYSTEM Description  Vol. 2  12.10.10 
Oct 05/06 


Fuel Distribution Schematic
Figure 12.10.8

FUEL TRANSFER

Description
During normal operations, fuel transfer from the tail tanks to the auxiliary tanks is controlled and monitored automatically by the FSCU. After initiating the fuel transfer, the FSCU monitors the operation to prevent CG excursions beyond acceptable forward and aft limits.


 FUEL SYSTEM Description  Vol. 2  12.10.11 
Oct 05/06 

Transfer of fuel from the tail tanks to the auxiliary tanks may be interrupted automatically by the FSCU, or manually by the flight crew, should a malfunction occur.
Components and Operation

Fuel System Computer Unit (FSCU)
The FSCU is a two-channel computer located in the underfloor avionics bay. Its main functions are fuel quantity gauging, tail tank to auxiliary tank automatic fuel transfer, and automatic refueling shutoff. Channel 1 of the FSCU is the primary controller, and channel 2 automatically replaces channel 1 in the event of failure.
FSCU outputs are used by the data concentrator units (DCUs) for fuel quantity displays, EICAS messages, and switch/lights on the FUEL control panel.
The FSCU is powered by the APU battery direct bus, DC essential bus, DC battery bus, and DC bus 1.

Tail Tank Transfer Pumps
Two tail tank transfer pumps (primary and secondary) are installed at the sump of the tail tank system. They transfer fuel from the tail tank system to the auxiliary tank system at a constant rate of 1,800 pounds per hour.

Rotor-Burst Protection Shroud
Because the tail tank lines run past the engines, a rotor-burst protection shroud covers the tail tank fuel lines in this area. The shroud is pressurized with nitrogen and monitored by the FSCU. Should a rotor burst rupture the line, pressure will be lost from the shroud, and tail tank fuel transfer will be inhibited. The AUTO TAIL XFER INHIB caution EICAS message will be displayed, and the amber AUTO INHIB switch/light will illuminate on the FUEL control panel. Manual override is available to the flight crew if the shroud is depressurized for non-engine-related reasons, by pushing the TAIL TANK TRANSFER MANUAL OVRD switch/light on the FUEL control panel.

FSCU Automatic Transfer Operation
 
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