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the fuel system and aircraft attitude information from the AHRS. The computer uses the information to calculate the fuel
weight.
PRESSURE FUELING
The refuel/defuel control panel controls all the refueling and defueling operations. It tests the integrity of the fuel system
components and displays individual fuel tank quantities. The refuel/defuel control panel is located in the right wing root
leading-edge fairing.
REFUELING AUTO MODE
In the AUTO MODE, the refueling personnel preselect the total fuel quantity through the INC/DEC switch. When the desired
quantity is set, use the ON/OFF toggle switch to start refueling. The fuel system computer automatically directs the
preselected quantity of fuel and is dispensed at 368.5 lbs per minute at 55 psi. When the desired quantity is reached, refueling
will automatically stop. Reposition the ON/OFF toggle switch to OFF.
REFUELING MANUAL MODE
The manual mode allows refueling personnel to direct fuel to a specific tank by selecting the appropriate shutoff valve open
or closed.
REV 1
FUEL
Volume 2 Flight Crew Operating Manual Sep 13/2004
12-01-08 CSP 100-6 REV 1
REFUELING/DEFUELING (Cont)
GROUNDING RECEPTACLES
Receptacles for grounding the aircraft to the refueling equipment are provided as follows:
- Adjacent to each gravity filler port
- Adjacent to the pressure refueling coupling
- Nose gear stud
SYSTEM TEST
The automatic pressure refueling, manual pressure refueling and automatic defueling procedures can be used after satisfactory
tests on the refuel/defuel system. The tests are to verify that all panel lamps operate correctly, the SOVs
operate correctly in manual and automatic modes.
Test the panel lamps with the following procedures:
- Select power switch ON
- Push Lamp Test button and verify all panel indication lamps illuminate
- Connect fuel nozzle to the refuel/defuel adapter to supply fuel pressure
- Select TEST position on the fuel selector switch
- Verify H. LEVEL DETECTOR, SOV CL and OP lamps illuminate
- Select OFF position on the fuel selector switch
- Verify that only the SOV OP lamps illuminate
Test the SOV operation with the following procedures:
- Select FUEL AUTO position with the fuel selector switch and the two SOV toggle switches OFF
- Verify SOV indication lamps are off
- Select FUEL AUTO position with the fuel selector switch and the two SOV toggle switches ON
- Verify SOV indication lamps illuminate OP
- Select TEST position with the fuel selector switch and the two SOV toggle switches ON
- Verify SOV lamps illuminate CL
HIGH-LEVEL SENSORS
The high-level sensors provide the fuel computer with a tank full signal, and provides for a 3% expansion space. When the
high-level sensor signals the computer a full condition during refueling operations, the computer closes the respective refuel
shutoff valve.
REFUEL/DEFUEL SINGLE-POINT ADAPTER
The refuel/defuel single-point adapter lets the operator connect the refueling nozzle to the aircraft to refuel or defuel. The
adapter is installed in the right fuselage fairing just forward of the right wing.
GRAVITY REFUELING
Gravity refueling is accomplished only in exceptional circumstances. The refueling process is done through the filler ports
located on the upper wing surfaces. Due to the shallow depth of the wing at the location of the filler cap, a protective plate
is provided in the tank in order to avoid damage to the bottom skin by the refueling nozzle.
The gravity filler port and cap for each wing tank is located approximately mid-wing.
WARNING: Gravity filler caps for the wing tanks are located below the maximum pressure refueling level. Never remove
the gravity filler caps if the wing tanks are full or fuel quantity is unknown.
FUEL
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 12-01-09
FUEL INDICATION AND CONTROL
DESCRIPTION
The fuel indication and control system provides fuel quantity indication and control of refuel and defuel functions. The
system consists of the fuel quantity gaging computer, fuel quantity probes, fuel temperature probes, fuel level sensors, and
the refuel/defuel panel.
COMPONENTS AND OPERATION
FUEL QUANTITY PROBES
Nine fuel quantity probes are distributed throughout each wing tank. The probes provide fuel level indications to the fuel
quantity gaging computer.
FUEL TEMPERATURE PROBE
The fuel temperature probe is located in the right wing tank and provides temperature information to the fuel indicating
system.
FUEL LEVEL SENSORS
A tank full fuel level sensor is located at the top of each tank. This sensor provides a cutoff signal to the refuel valve when
the tank is full.
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