TM 1-1520-238-T-7
11–252
11–33.
ASE BUCS CIRCUIT BREAKER DOES NOT STAY CLOSED – FAULT IN PILOT
11–33
BUCS WIRING
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Non–transparent
barrier 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. Detach P413. Check for short between
P413–B6 and ground.
Does short exist?
YES
Go to step 2.
NO
Go to step 3.
2. Check for short between J270–1 and ground
Does short exist?
YES
Repair shorted wire between
P413–B6 and J270–1.
Go to paragraph 11–23.
NO
Replace pilot longitudinal SPAD
(TM 1-1520-238-23).
3. Check for short between P413–B15 and ground.
Does short exist?
YES
Go to step 4.
NO
Go to step 5.
4. Check for short between J272–1 and ground.
Does short exist?
YES
Repair shorted wire between
P413–B15 and J272–1.
Go to paragraph 11–23.
NO
Replace pilot collective SPAD
(TM 1-1520-238-23).
5. Check for short between P472–A19 and ground.
Does short exist?
YES
Go to step 6.
NO
Go to step 7.
6. Check for short between J269–1 and ground.
Does short exist?
YES
Repair shorted wire between
P472–A19 and J269–1.
Go to paragraph 11–23.
NO
Replace pilot directional SPAD
(TM 1-1520-238-23).
7. Check for short between J271–1 and ground.
Does short exist?
YES
Repair shorted wire between
P472–A20 and J271–1.
Go to paragraph 11–23.
NO
Replace pilot longitudinal SPAD
(TM 1-1520-238-23).
END OF TASK
