TM 1-1520-238-T-7
Change 5
10–153
10–47
FUEL QUANTITY INDICATION/TRANSFER – MAINTENANCE OPERATIONAL
10–47
CHECK (cont)
Task
Result
ah. On pilot instrument panel, check FUEL
quantity indicator (fig. 10–63). FWD vertical
display shows decrease, AFT vertical
display shows increase.
If AFT vertical display shows decrease and FWD
vertical display shows increase, go to paragraph
10–66E.
ai. On CPG FUEL panel (fig. 10–67.3), set
TRANS switch to TO FWD.
aj. On pilot center circuit breaker panel, check
that FUEL TRANS circuit breaker stays
closed.
If FUEL TRANS circuit breaker does not stay closed
go to paragraph 10–66I.
ak. In ammo storage bay (fig. 10–67.2), have
assistant check fuel transfer pump for
operating noise.
If fuel transfer pump is not operating, go to paragraph
10–66F.
al. On pilot instrument panel, check FUEL
quantity indicator (fig. 10–63). FWD vertical
display shows increase, AFT vertical display
shows decrease.
If AFT vertical display shows increase and FWD
vertical display shows decrease, go to paragraph
10–66F.
NOTE
A difference of up to 10 % between pilot and CPG readouts is acceptable.
am. On CPG FUEL panel, set TRANS switch to
OFF and ORIDE switch to PLT. Check that
CPG selectable digital display (fig. 10–65)
digital readouts agree with pilot FUEL
quantity indicator displays/readouts.
If selectable digital display readouts do not agree with
pilot FUEL quantity indicator displays/readouts, refer
to TM 1-1520-238-T-5 to troubleshoot engine
instruments.
an. Service aft tank to 1300 pounds
(TM 1-1520-238-23).
ao. On pilot FUEL panel (fig. 10–58), set
TRANS switch to TO AFT. When aft tank is
full (1430 lbs) check that amber FUEL XFR
indicators on pilot and CPG caution/warning
panels are lighted.
If pilot and CPG amber FUEL XFR indicators are not
lighted, go to paragraph 10–66B.
ap. On pilot FUEL panel, set TRANS switch to
OFF.
5. Perform FUEL SYSTEM – POWER DOWN (para 10–11).
6. Install ammo storage magazine (TM 9-1090-208-23-1).
7. Disconnect maintenance headset (TM 1-1520-238-T-4).
END OF TASK
