TM 1-1520-238-T-7
10–100
Change 5
10–17. FUEL CROSSFEED/BOOST SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
10–17
Task
Result
l. On pilot FUEL panel (fig. 10–46), set ENG 1
switch to ON. Engine 1 fuel
crossfeed/shutoff valve indicator moves to
aft position.
(ADB) If FUEL XFEED circuit breaker (fig. 10–50)
does not stay closed, go to paragraph 10–35E.
If engine 1 fuel crossfeed/shutoff valve indicator does
not move to aft position, go to paragraph 10–32.
m. (ADB) On pilot and CPG caution/warning
panels (fig. 10–58), check that green
XFEED indicators are lighted.
If pilot and CPG green XFEED indicators are not
lighted, go to paragraph 10–35C.
n. (ADB) On pilot and CPG caution/warning
panels, check that amber XFEED indicators
are not lighted.
If amber XFEED indicators are lighted, go to
paragraph 10–35D.
o. On pilot FUEL panel, set BOOST switch to
ON. Fuel may be discharged through
engines 1 and 2 and nacelle overboard
drains.
If FUEL BST circuit breaker does not stay closed, go
to paragraph 10–43.
If FUEL BOOST switch does not stay ON with
CROSSFEED switches set to AFT TK, go to
paragraph 10–45.
p. On pilot caution/warning panel, check that
BOOST PMP ON indicator is lighted.
If BOOST PMP ON indicator is not lighted, go to
paragraph 10–23.
q. On pilot FUEL panel, set CROSSFEED
switch to NORM. BOOST switch moves to
OFF. BOOST PMP ON indicator is not
lighted. Engine 2 fuel crossfeed/shutoff
valve indicator moves to normal position
(fig. 10–53).
If BOOST switch does not move to OFF, go to
paragraph 10–46.
If BOOST PMP ON indicator is lighted with BOOST
switch OFF, go to paragraph 10–25.
If engine 2 fuel crossfeed/shutoff valve indicator does
not move to normal, go to paragraph 10–27.
r. On pilot FUEL panel (fig. 10–46), set
CROSSFEED switch to FWD TK. Engine1
and Engine 2 fuel crossfeed/shutoff valve
indicators move to forward position
(fig. 10–53).
If engine 1 fuel crossfeed/shutoff valve indicator does
not move to forward position, go to paragraph 10–30.
If engine 2 fuel crossfeed/shutoff valve indicator does
not move to forward, go to paragraph 10–28.
(ADB) If FUEL XFEED circuit breaker (fig. 10–50)
does not stay closed, go to paragraph 10–35H.
s. (ADB) On pilot and CPG caution/warning
panels (fig. 10–59), check that green
XFEED indicators are lighted.
If pilot and CPG green XFEED indicators are not
lighted, go to paragraph 10–35F.
