TM 1-1520-238-T-5
878
812.
PILOT ENG INST CIRCUIT BREAKER DOES NOT STAY CLOSED
812
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairers
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-T-6
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. Open ENG INST circuit breaker (CB17). Check
for short between (A76):
J1L and ground,
J1M and ground.
Does short exist?
YES
Refer to TM 1-1520-238-T-6 to
troubleshoot circuit protection
system (dc emergency bus
pilot station)
NO
Go to step 2.
2. With CB17 open, check for short between:
P40057 and ground,
P40058 and ground.
Does short exist?
YES
Repair shorted wire between:
P40057 and P463L,
P40058 and P463M.
Go to paragraph 810.
NO
Replace SDC
(TM 1-1520-238-23).
END OF TASK