TM 1-1520-238-T-7
11–374
Change 5
11–90.
STAB MAN AC CIRCUIT BREAKER – DOES NOT STAY CLOSED
11–90
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
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L200 panel 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. Open STAB MAN AC (A76)CB7 circuit breaker.
Detach P1 from (A402)J1.
Check for short between P1–37 and ground.
Does short exist?
YES
Refer to TM 1-1520-238-T-6
to troubleshoot circuit protection
system (ac essential bus 1 –
pilot station).
NO
Go to step 2.
2. (AAG) Depin (A402)GS1–H.
Check for short between (A402)J1–37 and
ground.
Does short exist?
YES
Repair shorted wire in A402.
Go to paragraph 11–88, or
replace (A402)T3
(TM 1-1520-238-23).
NO
Go to step 3.
3. (ABC) Depin (A402)GS9–H.
Check for short between (A402)J1–37 and
ground.
Does short exist?
YES
Repair shorted wire in A402.
Go to paragraph 11–88, or
replace (A402)T3
(TM 1-1520-238-23).
NO
Go to step 4.
4. Depin (A402)TB3–17–T.
Detach:
P441 from (A402)J24,
P431 from (A402)J27.
Check for short between (A402)J24–B19 and
ground.
Does short exist?
YES
Repair shorted wire between
(A402):
J24–B19 and TB3–17–S,
J27–A16 and TB3–17–R.
TB3–17–N and ground.
Go to paragraph 11–88, or
replace T3 (TM 1-1520-238-23).
NO
Go to step 5.
5. Check for short between P441–B19 and ground.
Does short exist?
YES
Go to step 6.
NO
Go to step 10.
