TM 55-1520-240-23-8
10-33
ISOLATING CONTAMINATION
(Continued)
10-33
METAL IN STATIC FILTER
4.
Make sure that there is enough fuel in fuel tanks
for proper operation of boost pumps.
5.
On PDP No. 1 (5), check that following circuit
breakers are closed (pushed in):
LH FUEL PUMP CONT
AUX AFT (6)
MAIN AFT (7)
MAIN FWD (8)
AUX FWD (9)
LH FUEL PUMPS
MAIN FWD (10)
MAIN AFT (11)
AUX FWD (12)
AUX AFT (13)
6.
Set FUEL PUMPS LEFT SIDE FWD AUX switch
(14) to ON.
7.
Check FUEL PRESS light (15) goes out.
8.
Place ear against forward fuel tank (10). If sound
of pump is irregular or loud or if light (15) does
not go out, the boost pump is defective.
9.
If necessary, replace boost pump (Tasks 10-69
and 10-70).
NOTE
A seized forward tank boost pump
can trip its LH FUEL PUMPS circuit
breaker (12).
10.
Set switch (14) to OFF.
10-161
