TM 55-1520-240-T
10-2.3 FUEL BOOST PUMP SYSTEM OPERATIONAL CHECK (Continued)
10-2.3
TASK
RESULT
33.
34.
Set LEFT SIDE FWD AUX FUEL PUMP
switch (26) to ON. Have helper standby left
side fwd aux tank and listen for operation of
boost pump.
Set LEFT SIDE AFT AUX FUEL PUMP
switch (25) to ON. Have helper standby left
side aft aux tank and listen for operation of
boost pump.
AUX PRESS light (17) will go out. If not, go to
task 10-2.27.
Fuel will transfer from LEFT SIDE FWD AUX
TANK to LEFT SIDE MAIN TANK. AUX PRESS
light (17) will come on when LEFT SIDE FWD
AUX tank is depleted. The fuel pump will shut off
automatically. If fuel pump continues running after
AUX PRESS light comes on and tank is empty,
replace left side thermistor control box.
Fuel will transfer from LEFT SIDE AFT AUX tank
to LEFT SIDE MAIN tank. AUX PRESS light (17)
will come on when LEFT SIDE AFT AUX tank is
depleted. The fuel pump will shut off automatical-
ly. If fuel pump continues running after AUX
PRESS light comes on and tank is empty, replace
left side thermistor control box.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery Disconnected
Electrical Power Off
END OF TASK
Change 3
10-45
