TM 1-1520-238-T-4
6–97
6–35.
CHIPS NOSE GRBX 1 INDICATOR – LIGHTS
6–35
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
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. Remove NGB 1 chip detector. Inspect for chips
(TM 1-1520-238-23).
Do chips exist on chip detector?
YES
Perform NGB1 chip detector
inspection (TM 1-1520-238-23).
NO
Go to step 2.
2. Check CHIPS NOSE GRBX 1 indicator with chip
detector removed.
Does indicator remain lighted?
YES
Replace NGB1 chip detector
(TM 1-1520-238-23).
NO
Go to step 3.
3. Check for short between P18–36 and ground.
Does short exist?
YES
Repair shorted wire between
P18–36 and J61–B. Go to
paragraph 6–12.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the pilot
caution/warning system.
END OF TASK
