TM 1-1520-238-T-7
10–167
10–50. PILOT FUEL QUANTITY INDICATOR FWD VERTICAL DISPLAY – DOES NOT
10–50
INDICATE CORRECT FUEL QUANTITY
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 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L40 door removed
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. With P937 attached to FSC, press bit TEST
button on FSC. Check for 4.9 to 5.1 VDC
between P253–22 and P253–23.
Is voltage present?
YES
Replace pilot FUEL quantity
indicator (TM 1-1520-238-23).
NO
Go to step 2.
2. Check for open between:
P937–J and P253–19,
P937–J and P253–23,
P937–L and P253–22.
Does open exist?
YES
Repair open wire.
Go to paragraph 10–48.
NO
Go to step 3.
3. Check for 28 VDC at P937–H.
Is voltage present?
YES
Replace FSC
(TM 1-1520-238-23).
NO
Repair open wire between
P401–45 and P937–H.
Go to paragraph 10–48.
END OF TASK
