TM 1-1520-238-T-7
10–111
10–21. FUEL BST CIRCUIT BREAKER – DOES NOT STAY CLOSED
10–21
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-6
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Electrical power
distribution box cover
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. Detach P1 from (A402)J1. Check that FUEL
BST circuit breaker is closed.
Does circuit breaker stay closed?
YES
Go to step 2.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot circuit protection
system (dc essential bus 2 –
pilot station).
2. Detach wire end at (A402)TB2-29-P. Check for
short between P191-B1 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 10–17.
NO
Go to step 3.
3. Attach P191. Check for short between detached
wire end at (A402)TB2-29-P and ground.
Does short exist?
YES
Replace CPG FUEL panel
(TM 1-1520-238-23).
NO
Go to paragraph 10–17.
END OF TASK
