TM 1-1520-238-T-7
10–222
10–78. REFUEL VALVE OPEN INDICATOR ON REFUELING PANEL – IS NOT LIGHTED
10–78
WITH REFUEL VALVE SWITCH SET TO OPEN
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-T-4
TM 1-1520-238-T-6
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provision –
R160 door open
TM 1-1520-238-T-4
Maintenance headset
connected
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. On refueling panel, with FUEL QTY switch at
IND ON and REFUEL VALVE switch at OPEN,
press REFUEL VALVE OPEN indicator.
Does indicator light?
YES
Go to step 4
NO
Go to step 2.
2. On pilot center circuit breaker panel, check
FUEL FILL circuit breaker.
Does circuit breaker stay closed?
YES
Go to step 3.
NO
Go to paragraph 10–87.
3. Check for open between:
CB32 and (A402)TB2–13–Z,
(A402)TB2–13–Y and P260–3.
Does open exist?
YES
Repair open wire between:
CB32 and (A76)J1–A,
P463–A and P429–B20,
(A402)J23–B20 and
(A402)TB2–13–Y,
(A402)TB2–13–Y and
(A402)J31–A9,
P444–A9 and P260–3.
Go to paragraph 10–76.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot circuit protection
system (dc emergency bus –
pilot station).
4. Check for open between:
P260–11 and P251–1,
P251–3 and P444–A4.
Does open exist?
YES
Repair open wire.
Go to paragraph 10–76.
NO
Go to step 5.
5. With P260 attached to (A57)J1. Check for
28 VDC at P251–1.
Is voltage present?
YES
Go to step 6.
NO
Replace refueling panel
(TM 1-1520-238-23).
6. Check for 28 VDC at P444–A4.
Is voltage present?
YES
Go to step 7.
NO
Replace fuel transfer shutoff
valve (TM 1-1520-238-23).
