TM 1-1520-238-T-7
10–143
10–46. FUEL BOOST SWITCH – DOES NOT GO TO OFF WITH CROSSFEED SWITCH
10–46
SET TO NORM
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
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 for open between (A131):
S1-1 and S1-2.
Does open exist?
YES
Go to step 2.
NO
Replace pilot FUEL panel
(TM 1-1520-238-23).
2. Check for 28 VDC at P174-B5.
Is voltage present?
YES
Go to step 3.
NO
Replace pilot FUEL panel
(TM 1-1520-238-23).
3. Check for open between (A179):
S2-4 and S2-6.
Does open exist?
YES
Go to step 4.
NO
Replace CPG FUEL panel
(TM 1-1520-238-23).
4. Check for short between:
P174-B5 and P174-B17,
P174-B18 and P174-B19.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 10–17.
NO
Go to paragraph 10–47.
END OF TASK
