TM 1-1520-238-T-7
10168
1051. PILOT FUEL QUANTITY INDICATOR AFT VERTICAL DISPLAY DOES NOT
1051
INDICATE CORRECT FUEL QUANTITY
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairers
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, depress FSC bit
TEST button. Check for 4.9 to 5.1 VDC between
P25318 and P25319.
Is voltage present?
YES
Replace pilot FUEL quantity
indicator
(TM 1-1520-238-23).
NO
Go to step 2.
2. Check for open between:
P937J and P25319,
P937J and P25323,
P937U and P25318.
Does open exist?
YES
Repair open wire.
Go to paragraph 1048.
NO
Go to step 3.
3. Check for 28 VDC at P937H.
Is voltage present?
YES
Replace FSC
(TM 1-1520-238-23).
NO
Repair open wire between
P40145 and P937H.
Go to paragraph 1048.
END OF TASK