TM 1-1520-238-T-6
9–475
9–214. PILOT CBR BLWR CIRCUIT BREAKER (CB94) – DOES NOT STAY CLOSED
9–214
OR 28 VDC IS NOT PRESENT AT P1-19
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 3-4240-312-12&P
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. On pilot aft circuit breaker panel, close CBR
BLWR circuit breaker (CB94).
Does CBR BLWR circuit breaker stay closed?
YES
Go to step 2.
NO
Go to step 4.
2. Detach P993 and check for short between
P993-A and P993-B.
Does short exist?
YES
Replace pilot CBR filter blower
(TM 3-4240-312-12&P).
NO
Go to step 3.
3. On pilot aft circuit breaker panel, detach P1.
Check for short between P1-19 and ground.
Does short exist?
YES
Repair shorted wire between
CB94-2 and P1-19.
Go to paragraph 9–206.
NO
Repair shorted wire between
(A402):
J1-19 and J24-B5.
Go to paragraph 9–206.
4. Check for 28 VDC between P993-A and ground.
Is voltage present?
YES
Repair open wire between
P993-B and ground.
Go to paragraph 9–206.
NO
Go to step 5.
5. Check for 28 VDC at (A402)J4-N.
Is voltage present?
YES
Go to step 6.
NO
Go to paragraph 9–30.
6. Check for continuity between P4-N and P1-19.
Does continuity exist?
YES
Repair open wire between
(A402)J1-19 and P993-B.
Go to paragraph 9–206.
NO
Repair open wire between P4-N
and P1-19.
Go to paragraph 9–206.
END OF TASK
