TM 1-1520-238-T-5
8–79
8–13.
CPG EMERG BATT ENG INST CIRCUIT BREAKER – DOES NOT STAY CLOSED
8–13
(HELICOPTERS WITHOUT CPG DIM/TEST PANEL INSTALLED)
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
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 CPG EMERG BATT ENG INST circuit
breaker (CB31). Check for short between (A77):
J1–8 and ground,
J1–10 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 CB31 open, detach P401. Check for short
between:
P766–8 and ground,
P766–10 and ground.
Does short exist?
YES
Repair shorted wire between:
P766–8 and P401–57,
P766–10 and P401–58.
Go to paragraph 8–10.
NO
Replace SDC
(TM 1-1520-238-23).
END OF TASK
