TM 1-1520-238-T-7
10–150
Change 5
10–47. FUEL QUANTITY INDICATION/TRANSFER – MAINTENANCE OPERATIONAL
10–47
CHECK (cont)
Task
Result
f. On CPG selectable digital display
(fig. 10–65), push and hold TEST
pushbutton. Check that digital readouts
indicate 888, then release.
If digital readouts do not indicate 888, refer to
TM 1-1520-238-T-5 to troubleshoot engine
instruments.
NOTE
A difference of up to 10 % between pilot and CPG readouts is acceptable.
g. Select FUEL QTY on CPG selectable digital
display and compare CPG selectable digital
display digital readouts with pilot FUEL
quantity indicator (fig. 10–63) TOTAL digital
readout.
If selectable digital display digital readouts do not
agree with pilot FUEL quantity indicator TOTAL digital
readout, refer to TM 1-1520-238-T-5 to troubleshoot
engine instruments.
h. On pilot FUEL quantity indicator, check that
FWD vertical display indicates 29 to 31.
If pilot FUEL quantity indicator FWD vertical display
does not indicate 29 to 31, go to paragraph 10–48 or
10–48A.
i. On pilot FUEL quantity indicator, check that
AFT vertical display indicates 19 to 21.
If pilot FUEL quantity indicator AFT vertical display
does not indicate 19 to 21, go to paragraph 10–48 or
10–48A.
j. On pilot and CPG caution/warning panels
(fig. 10–56 and fig. 10–57), check that FUEL
LOW AFT indicators are lighted and FUEL
LOW FWD indicator and REFUEL VALVE
OPEN indicator are not lighted.
If FUEL LOW AFT indicators are not lighted, go to
paragraph 10–52.
If pilot FUEL LOW FWD indicator is lighted, go to
paragraph 10–62.
If REFUEL VALVE OPEN indicator is lighted, have
assistant open R160 door and verify on refueling
panel (fig. 10–61) that REFUEL VALVE switch is set
to CLOSE. If switch is set to CLOSE and refuel valve
indicator remains lighted, go to paragraph 10–76,
then complete this maintenance operational check.
k. 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 paragraph 10–66C.
l. (ADA) On pilot and CPG instrument panels,
check that green FUEL XFR/XFER advisory
lights (fig. 10–67) are not lighted.
If pilot and CPG green FUEL XFR/XFER advisory
lights are lighted, go to paragraph 10–66G.
