TM 1-1520-238-T-4
Change 5
6–87
6–27.
OIL PSI MAIN XMSN 1 INDICATOR – DOES NOT LIGHT WITH ELECTRICAL POWER
6–27
APPLIED AND ALL POWER PLANTS OFF
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. Check for open between J755–25 and J755–26.
Does open exist?
YES
Replace main transmission oil
system 1 low oil pressure switch
(TM 1-1520-238-23).
NO
Go to step 2.
2. Check for open between:
P18–9 and P456–A7,
J456–A7 and P755–25,
P755–26 and ground.
Does open exist?
YES
Repair open wire.
Go to paragraph 6–12.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the pilot
caution/warning system.
END OF TASK
