3.
Auxiliary fuel quantity switch -CAL.
NOTE
CAL is the calibration value marked on the fuel .ow transmitter. Enter the four digit number, disregarding the numbers to the right of the decimal point.
4.
INCR/DECR switch -Set calibration.
5.
Auxiliary fuel quantity switch -OUTBD.
6.
INCR/DECR switch -Set outboard fuel quan-tity.
7.
Auxiliary fuel quantity switch move to TOTAL -Check.
8.
PRESS OUTBD switch -As desired.
4.10.6 Fuel Transfer Sequence.
FUEL BOOST PUMP CONTROL switches shall remain on during external range fuel transfer and remain on for 10 minutes after PRESS switches are moved to OFF. Failure to observe this warning may cause engine .ameout.
Fuel transfer sequence must be carefully planned and executed in order to main-tain CG within limits.
Fuel transfer sequence shall be based on mission re-quirement and center of gravity limitations. Automatic transfer is started when the proper switches are manipulated and fuel level is as shown below and external range tanks internal pressure is increased enough to force fuel to the main tanks. Transfer will continue until the main tank sig-nal conditioner provides a signal through the microproces-sor to stop fuel transfer. This cycle is done as required until interrupted by placing the MODE switch to OFF or MANUAL or placing the PRESS switch OFF. Manual transfer will be started on selection of MANUAL and ap-propriate switches, and external fuel tanks are bleed-air pressurized to start fuel transfer from external tank(s) to
Pages 4-42.1 through 4-42.2 deleted.
4-42 Change 3
main tanks. Transfer will continue until tanks are full. They will remain full as long as the manual mode remains en-gaged. Manual transfer requires close monitoring of fuel level to initiate and stop transfer to remain within CG lim-its. The automatic transfer sequence is as follows:
TOTAL AUXILIARY FUEL REMAINING (BASED ON JP-4 DENSITY)
8840-7041 lbs
7040-5001 lbs
5000-0 lbs
TRANSFER
START WHEN
ONE MAIN
FUEL TANK
QUANTITY
LESS THAN
950 lbs 750 lbs 600 lbs
AA0665
SA
TRANSFER
STOP WHEN
EACH MAIN
FUEL TANK
QUANTITY MORE THAN
1000 lbs 1000 lbs 1000 lbs
Change 3 4-43
4.10.7 External Extended Range Fuel Transfer Check.
NOTE
When ambient temperature is below 4°C (40°F), ESSS/ERFS shall not be turned off after transfer check has been completed to avoid potential for freeze-up of the pressure regulator.
1.
AIR SOURCE HEAT/START switch -ENG.
2.
FUEL BOOST PUMP CONTROL switches -Check ON.
FUEL BOOST PUMP CONTROL switches shall remain on during external range fuel transfer and remain on for 10 minutes after PRESS switches are moved to OFF. Failure to observe this warning may cause engine .ameout.
3.
PRESS OUTBD switch -ON.
4.
Fuel quantity switch -TOTAL.
5.
TANKS switch -As desired.
6.
MODE switch -MANUAL.
7.
MANUAL XFR RIGHT switch -ON.
8.
Main FUEL QTY TOTAL FUEL readout -Check for increase of about 20 pounds.
9.
TANKS switch -Repeat for other position.
10.
MANUAL XFR RIGHT switch -OFF.
11.
MANUAL XFR LEFT switch -ON.
12.
Repeat steps 8. and 9. for MANUAL XFR LEFT.
13.
MANUAL XFR switches -OFF.
14.
External extended range fuel system -Set as desired.
4.10.7.1 External Extended Range Fuel Transfer In AUTO Mode.
NOTE
If either main fuel quantity is below 1,000 lbs., selecting the automatic mode may ini-tiate a transfer sequence.
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