TM 1-1520-238-T-6
9566
9273. FUEL VLV ACTR CIRCUIT BREAKER (CB14) DOES NOT STAY CLOSED OR 28 VDC
9273
IS NOT PRESENT AT (A76)J1-C
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
TM 1-1520-238-T-8
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. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does FUEL VLV ACTR circuit breaker (CB14)
stay closed?
YES
Go to step 4.
NO
Go to step 2.
2. On pilot center circuit breaker panel, open FUEL
VLV ACTR circuit breaker (CB14). Set
BATT/EXT PWR switch to OFF. Check for short
between (A76)J1-C and ground.
Does short exist?
YES
Go to step 3.
NO
Refer to TM 1-1520-238-T-8 to
troubleshoot fire extinguishers.
3. Detach wire at CB14-2. Check for short between
(A76)J1-C and ground.
Does short exist?
YES
Repair shorted wire between
CB14-2 and (A76)J1-C.
Go to paragraph 9263.
NO
Replace FUEL VLV ACTR
circuit breaker (CB14)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between CB14-2 and (A76)J1-C.
Does open exist?
YES
Repair open wire.
Go to paragraph 9263.
NO
Replace FUEL VLV ACTR
circuit breaker (CB14)
(TM 1-1520-238-23).
END OF TASK