05/16/16
Overview
The fuel management and quantity gauging system (FMQGS) monitors the fuel quantity and the fuel pressure of the fuel system. The system software monitors the condition of the fuel management and quantity gauging computer (FMQGC) along with all related hardware.
The FMQGS monitors, calculates, and shows the fuel totals, fuel temperature, and the condition of the fuel system. This data is transmitted through a ARINC 429 data bus to the engine indication and crew alerting system (EICAS). The fuel tank totals and the fuel system total is supplied to the refuel/defuel control panels. This is necessary for accurate ground servicing of the aircraft.
There is a forward auxiliary fuel-tank on A/C 9003 and 9096 for Global Express, or on Global XRS.
05/16/16
Fuel Management and Quantity Gauging System (FMQGS)
The FMQGC is a dual-channel computer with built-in test equipment (BITE). The FMQGC receives inputs from quantity probes, compensators, densitometers, temperature sensors and high level sensors. The FMQGC sends and receives all the digital signals related to the system control and indication. The FMQGC does the necessary operations related to the fuel gauging system. The output of the FMQGC shows each fuel tank quantity, total fuel quantity, and fuel temperature on the EICAS display. The FMQGC also corrects the pitch attitude of the aircraft as the fuel quantity decreases during flight.
The FMQGC monitors the fuel system components. It tells the crew of any component failures as necessary. The FMQGC also monitors the fuel system components for any faults. The fault messages supplied by the FMQGS will show on the fault message block of the display page of the EICAS. Faults for the engine feed system or the fuel transfer systems will show on the EICAS fuel synoptic page.
If a fuel probe is at fault, the fault is sent to the data acquisition unit (DAU). A fuel probe fault is not shown to the crew because of redundancy in the system design. The fault will be kept until it is transmitted by the ground maintenance team. The faults in the DAU are transmitted to the maintenance crew through the portable maintenance access terminal (PMAT).
