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FMQGC - FAILURE
FMQGC will be displayed in the TOTAL window and FAILURE in the PRESEL
window if the Refuel/Defuel Panel is not communicating with the fuel computer.
TOTAL PRESEL
LEFT CENTER RIGHT
AFT
REPEATER
This indicates that two
panels are powered on.
GX_11_025
10000 8000
30000 2000
10000
REPEATER
For Training Purposes Only
Sept 04
11-35
P I LOT T R A I N I N G GU I D E
FUEL SYSTEM
PRESSURE REFUELING
Pressure refueling is accomplished through the single point refuel/defuel adapter,
located in the right hand wing root, and is controlled by the refuel/defuel control panel.
An optional duplicate refuel/defuel control panel can be installed in the flight
compartment.
NOTE
A SHUTOFF TEST must be carried out prior to all refueling
operations.
If the test is successful, a SOV PASS is displayed in the PRESEL window. If the test
fails, a SOV FAIL is displayed in the PRESEL window.
Pressure refueling may be performed in either “automatic” or “manual” mode. The
airplane does not have a fuel jettison system.
A preselect fuel quantity is used during automatic refueling of the airplane. This
method will allow the airplane to be filled automatically to the desired fuel state
selected.
NOTE
The preselect quantity is the desired final total fuel quantity in the
tanks, and not the quantity to be added.
The computer determines the required distribution of fuel into each of the aircraft
tanks to achieve the preselected value and controls each refuel valve accordingly. The
refuel schedule (planning only) will fill the wings first, then the aft tank, then the
center tank. If the aft or center tanks are used each will be fueled to a minimum of 500
pounds to ensure pump priming. The shutoff point, for each tank, is “anticipated” by
the computer by monitoring the refueling rate to determine the correct shutoff point for
each individual refueling operation.
When auto refueling is terminated by the computer, the quantity showing in the
TOTAL window is equal to that in the PRESEL window.
Auto refueling can be interrupted at any time by moving the START/STOP switch to
the STOP position. Individual tank quantities can be seen in the other two windows of
the display.
The AFT ON/OFF switch allows auto refueling to take place with or without fuel
being placed in the aft tank.
P I LOT T R A I N I N G GU I D E
FUEL SYSTEM
11-36 For Training Purposes Only
Sept 04
EARLIER VERSION RDCP REFUEL/DEFUEL PROCEDURES
NOTES
1. The maximum refueling pressure is 50 psig.
2. The Tank Pressure Relief Valves must be tested for proper
function prior to refueling by manually operating the three
external pull handles.
3. Maximum fuel imbalance of 400 pounds/1100 pounds
(depending on FMQGC software version, see NORMAL FUEL
LOADING section) is allowed between the two main tanks,
following which, the tank quantity window on the RDCP flashes
an IMBAL message alternating with the tank quantities every two
seconds.
4. A SHUTOFF TEST of the system must be conducted during
each refueling.
AUTO REFUEL
The procedure for auto refuel is as follows:
• Open the RDCP access panel
• Place the MASTER switch in the ON position
• Allow the FMQGC to conduct BITE test until tank quantities are displayed steady
in all windows
NOTE
If a system fault is detected, the windows will display dashed
lines or error message(s) in the individual tank windows instead
of quantities. Do not proceed without investigating and rectifying
fault.
• Verify no error messages are displayed in any of the individual tank quantity
windows
• Verify all MANUAL tank switches are in the CLOSE position
• Place the MODE SELECTOR switch in the AUTO REFUEL position
• Note the quantities in the TOTAL and PRESEL windows. They should be the
same
• Place the AFT switch in the ON or OFF position as required
• Hold the PRESEL switch in the INCR position until the PRESEL window displays
the desired total fuel quantity
• Connect the refuel tender to the single point adapter and adjust the tender pressure
as desired but not to exceed 50 psig
For Training Purposes Only
Sept 04
11-37
P I LOT T R A I N I N G GU I D E
FUEL SYSTEM
• Place the START/STOP switch in the START position and release it
• Verify tank quantities show increase
• Place the spring-loaded SHUTOFF TEST switch in the TEST position and hold it.
• Verify the PRESEL window displays SOV TEST
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