TM 1-1520-238-T-4
695
633.
OIL PSI NOSE GRBX 1 INDICATOR DOES NOT LIGHT WITH ELECTRICAL POWER
633
APPLIED AND ALL POWER PLANTS OFF
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairers
Multimeter, Digital
AN/PSM-45
Personnel Required:
68F
Aircraft Electrician
References:
TM 1-1520-238-T-6
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions
L200 access panel
open
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 P61D and P61E.
Does open exist?
YES
Replace NGB 1 low oil pressure
switch (TM 1-1520-238-23).
NO
Go to step 2.
2. Check for open between:
J61D and P1844,
J61E and ground.
Does open exist?
YES
Repair open wire. Go to
paragraph 612.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the pilot
caution/warning system.
END OF TASK