TM 1-1520-238-T-7
10–224
10–79. REFUEL VALVE OPEN INDICATOR ON PILOT CAUTION/WARNING PANEL – IS
10–79
NOT LIGHTED 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 pilot master caution/warning panel, press
PRESS TO TEST indicator.
Is REFUEL VALVE OPEN indicator lighted?
YES
Go to step 2.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot master
caution/warning system.
2. Check for open between:
P18–76 and (A402)K3–4–A2,
(A402)K3–4–X1 and (A402)J31–A4,
(A402)K3–4–X2 and ground,
P444–A4 and P260–7,
P251–3 and P260–7.
Does open exist?
YES
Repair open wire.
Go to paragraph 10–76.
NO
Go to step 3.
3. Check resistance between (A402):
K3–4–X1 and K3–4–X2.
Is resistance 316 10 ohms?
YES
Replace refueling panel
(TM 1-1520-238-23).
NO
Replace relay (A402)K3–4
(TM 1-1520-238-23).
END OF TASK
