TM 1-1520-238-T-5
8–119
8–51.
CPG SDD PANEL FUEL QTY LBX10 DIGITAL READOUT – DOES NOT INDICATE EXISTING
8–51
FUEL 20 POUNDS
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer (2)
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 pilot fuel quantity indicator digital
readouts.
Is correct existing fuel ( 20 pounds )
indicated?
YES
Go to step 2.
NO
Go to paragraph 8–35.
2. With pilot and CPG ENG INST circuit breakers
closed. Check between P75–20 and ground for
1 VDC for each 280 pounds of fuel in forward
tank.
Is voltage present?
YES
Go to step 3.
NO
Go to step 4.
3. Check between P75–21 and ground for 1 VDC
for each 280 pounds of fuel in aft tank.
Is voltage present?
YES
Replace CPG SDD panel
(TM 1-1520-238-23).
NO
Go to step 4.
4. Check for open between:
P75–20 and P253–1,
P75–21 and P253–2.
Does open exist?
YES
Repair open wire.
Go to paragraph 8–10.
NO
Replace pilot fuel indicator
(TM 1-1520-238-23).
END OF TASK
