TM 1-1520-238-T-4
6–102
6–40.
ENG CUT CIRCUIT BREAKER – DOES NOT STAY CLOSED
6–40
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68F
Aircraft Electrician
References:
TM 1-1520-238-T-6
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 short between (A76)J1–b 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. Identify and detach wires from (A402):
TB2–29–T and TB2–29–Z. Check for short
between (A402):
J21–A18 and ground,
J27–B2 and ground.
Does short exist?
YES
Repair shorted wire between
(A402):
J21–A18 and TB2–29–T,
J27–B2 and TB2–29–Z.
Go to paragraph 6–12.
NO
Go to step 3.
3. Detach P755. Check for short between P431–B2
and ground.
Does short exist?
YES
Repair shorted wire between
P431–B2 and P755–1.
Go to paragraph 6–12.
NO
Refer to chapter 4 to
troubleshoot power plants.
END OF TASK
