TM 1-1520-238-T-7
Change 1
10–241
10–94. FUEL FILL CIRCUIT BREAKER – DOES NOT STAY CLOSED WITH LVL CONT
10–94
VALVES SWITCHES SET TO CLOSE
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. Check for short between (A57):
J1–1 and chassis ground,
J1–2 and chassis ground,
J1–3 and chassis ground,
J1–4 and chassis ground,
J1–7 and chassis ground,
J1–8 and chassis ground,
J1–9 and chassis ground,
J1–10 and chassis ground,
J1–11 and chassis ground,
J1–16 and chassis ground.
Does short exist?
YES
Replace refueling panel
(TM 1-1520-238-23).
NO
Go to step 2.
2. Attach positive meter lead to (A131):
J2–B2 and J2–B3, check for short to chassis
ground.
Does short exist?
YES
Replace pilot FUEL panel
(TM 1-1520-238-23).
NO
Go to step 3.
3. Detach P260. Attach positive meter lead to
P179–B1, P179–B2 and P179–B3 and check for
short to ground.
Does short exist?
YES
Go to step 9.
NO
Go to step 4.
4. Check for short between P260–8 and ground.
Does short exist?
YES
Go to step 8.
NO
Go to step 5.
5. Attach positive meter lead to P260–2 and check
for short to ground.
Does short exist?
YES
Go to step 6.
NO
Go to paragraph 10–87 to
troubleshoot FUEL FILL circuit
breaker (CB32).
6. Detach P1067. Attach positive meter lead to
P260–2 and check for short to ground.
Does short exist?
YES
Go to step 7.
NO
Replace aft fuel cell isolation
switch (TM 1-1520-238-23).
7. Detach P943. Check for short between P260–2
and ground.
Does short exist?
YES
Repair shorted wire between:
P260–2 and P943–1,
P943–1 and P1067–1.
Go to paragraph 10–76.
NO
Replace aft fuel cell fuel level
control pilot valve
(TM 1-1520-238-23).
8. Detach P1067. Check for short between
P260–8 and ground.
Does short exist?
YES
Repair shorted wire between
P260–8 and P1067–2.
Go to paragraph 10–76.
NO
Replace aft fuel isolation switch
(TM 1-1520-238-23).
