TM 1-1520-238-T-7
Change 5
10–152.1
10–47. FUEL QUANTITY INDICATION/TRANSFER – MAINTENANCE OPERATIONAL
10–47
CHECK (cont)
Task
Result
s. (ADB) On pilot and CPG caution/warning
panels (fig. 10–56 and fig.10–57), check that
green FUEL XFR indicators are lighted.
If pilot and CPG green FUEL XFR indicators are not
lighted, go to paragraph 10–66A.
t. On pilot and CPG caution/warning panels,
check that amber FUEL XFR indicators are
not lighted.
If pilot and CPG amber FUEL XFER indicators are
lighted, go to to paragraph 10–76 to troubleshoot
pressure refueling/defueling system.
If pilot and CPG amber FUEL XFER indicators are
still lighted, replace fuel transfer pump
(TM 1-1520-238-23).
NOTE
When caution/warning panel FUEL LOW FWD indicator is set to illuminate
between 160 and 200 lbs. at ground attitude (4.3 to 4.6 tail down), it will
illuminate between 260 and 300 lbs. (per TM 1-1520-238-10) at cruise attitude
(3.0 to 3.3 nose down).
u. On pilot and CPG instrument panels, as
FUEL quantity indicator FWD vertical
display indicates 20 to 16, check that pilot
and CPG caution/warning panel FUEL LOW
FWD indicators are lighted.
If pilot and CPG caution/warning panel FUEL LOW
FWD indicators are not lighted with pilot FUEL
quantity indicator FWD vertical display indicating 20 to
16, go to paragraph 10–57.
v. On pilot FUEL panel (fig. 10–58), set
TRANS switch to TO FWD.
w. On pilot center circuit breaker panel
(fig. 10–67.1), check that FUEL TRANS
circuit breaker stays closed.
If FUEL TRANS circuit breaker does not stay closed
go to paragraph 10–58.
x. 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
10–60.
y. 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
10–60.
z. (ADA) On pilot and CPG instrument panels,
check that green FUEL XFR/XFER advisory
lights (fig. 10–67) are lighted.
If pilot green FUEL XFR and CPG FUEL XFER
advisory lights are not lighted, replace pilot FUEL
panel (TM 1-1520-238-23).
aa. (ADB) On pilot and CPG caution/warning
panels (fig. 10–56 and fig.10–57) , check
that green FUEL XFR indicators are lighted.
If green pilot and CPG FUEL XFR indicators are not
lighted, replace pilot FUEL panel
(TM 1-1520-238-23).
