TM 1-1520-238-T-6
9–562
9–269. LT SRCH/LDG CIRCUIT BREAKER (CB22) – DOES NOT STAY CLOSED
9–269
OR CONTINUITY DOES NOT EXIST BETWEEN P5-2 AND P5-4
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 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. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does LT SRCH/LDG circuit breaker (CB22)
stay closed?
YES
Go to step 4.
NO
Go to step 2.
2. On pilot center circuit breaker panel, open LT
SRCH/LDG circuit breaker (CB22). Set
BATT/EXT PWR switch to OFF. Check for short
between P5-4 and ground.
Does short exist?
YES
Go to step 3.
NO
Go to paragraph 9–80 to
troubleshoot landing/search
light.
3. Detach wire at CB22-2. Check for short between
P5-4 and ground.
Does short exist?
YES
Repair shorted wire between
CB22-2 and P5-4.
Go to paragraph 9–263.
NO
Replace LT SRCH/LDG circuit
breaker (CB22)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB22-1 and CB23-1,
CB22-2 and P5-4.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–263.
NO
Replace LT SRCH/LDG circuit
breaker (CB22)
(TM 1-1520-238-23).
END OF TASK
