TM 1-1520-238-23
1-28
1.15.
FUEL SERVICING - CLOSED CIRCUIT REFUELING (CCR) METHOD – continued
h. Service fuel tanks as required.
(1) To refuel, select level control valve switch
position and advisory indicator condition from
following chart:
TANKS TO BE REFUELED
FWD TNK / AFT TNK SWITCHES
BOTH
AFT ONLY
FWD ONLY
AFT TANK
OPEN
OPEN
CLOSED
LEVEL CONT VALVES
FWD TANK
OPEN
CLOSED
OPEN
AFT CLOSED
OFF
OFF
ON
INDICATORS
FWD CLOSED
OFF
ON
OFF
CAUTION
The fuel system may be damaged if air
does not vent from fuel cells during ser-
vicing.
i. Check vent tubes (17) and (18) for escaping
air.
j. Stop fuel servicing if air does not escape from
vent tubes (17) and (18).
NOTE
FWD CLOSED and AFT CLOSED indi-
cators will light when fuel cell is full and
automatic shutoff has occurred.
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M04-1593-12
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