TM 1-1520-238-T-4
6–113
6–47.
OIL PSI NOSE GRBX 1 INDICATOR – IS LIGHTED WHEN HOD DISPLAYS NORMAL
6–47
NGB 1 OIL PRESSURE (cont)
7. Check for open between:
P673–85 and P673–84,
P673–85 and P673–112,
P673–85 and P673–113.
Does open exist?
YES
Go to step 8.
NO
Go to step 9.
8. Check for open between:
P61–L and P61–M,
P61–L and P61–P,
P61–L and P61–R.
Does open exist?
YES
Replace NGB 1 oil pressure
transducer (TM 1-1520-238-23).
NO
Repair open wire between:
P61–L and P673–85,
P61–M and P673–84,
P61–P and P673–112,
P61–R and P673–113.
Go to paragraph 6–13.
9. Check for short between:
P673–84 and ground,
P673–85 and ground,
P673–112 and ground,
P673–113 and ground.
Does short exist?
YES
Go to step 10.
NO
Refer to TM 9-1230-476-20-2 to
troubleshoot multiplex
subsystem.
10. Check for short between:
P61–L and ground,
P61–M and ground,
P61–P and ground,
P61–R and ground.
Does short exist?
YES
Replace NGB 1 oil pressure
transducer (TM 1-1520-238-23).
NO
Repair shorted wire between:
P61–L and P673–85,
P61–M and P673–84,
P61–P and P673–112,
P61–R and P673–113.
Go to paragraph 6–13.
END OF TASK
