TM 1-1520-238-T-7
10–203
10–72. GRAVITY REFUELING/DEFUELING – MAINTENANCE OPERATIONAL CHECK (cont)
10–72
PUSH-TO-DRAIN
CONTROL
PAIL
AFT FUEL
CELL VENT
FWD FUEL
CELL VENT
M70-074
FUEL CELL
SUMP DRAIN
Figure 10–76.
Mid-Lower RH Fuselage
Task
Result
p. Release push-to-drain control (fig. 10–76).
Fuel stops flowing from sump drain.
If fuel flows from sump drain with push-to-drain
control released, go to paragraph 10–14.
q. Repeat steps a. thru p. above to check
remaining fuel cell, then go to step r.
r. On refueling panel (fig. 10–73), set REFUEL
VALVE switch to CLOSE. Refuel valve is
heard to close and REFUEL VALVE OPEN
indicator is not lighted.
If REFUEL VALVE OPEN indicator is lighted with
REFUEL VALVE switch set to CLOSE, go to
paragraph 10–86.
s. Set FUEL QTY switch to OFF. AFT and
FWD indicators indicate E.
If AFT FUEL QTY indicator does not indicate E with
FUEL QTY switch set to OFF, go to paragraph 10–84.
If FWD FUEL QTY indicator does not indicate E with
FUEL QTY switch set to OFF, go to paragraph 10–85.
