TM 1-1520-238-T-4
6–119
6–51.
OIL PSI MAIN XMSN 1 INDICATOR – IS LIGHTED WHEN HOD DISPLAYS NORMAL
6–51
XMN 1 OIL PRESSURE (cont)
5. Remove oil system 1 heat exchanger pressure
transducer. (TM 1-1520-238-23). Install pressure
gage. Start engine 1 and place PWR lever to
FLY (TM 1-1520-238-CL). Operate until readings
stabilize.
Does oil pressure gage read above 28 LBS?
YES
Go to step 6.
NO
Replace system 1 main
transmission pump
(TM 1-1520-238-23).
6. Check for open between:
P673–95 and P673–94,
P673–95 and P673–110,
P673–95 and P673 111.
Does open exist?
YES
Go to step 8.
NO
Go to step 7.
7. Check for short between:
P673–94 and ground,
P673–95 and ground,
P673–110 and ground,
P673–111 and ground.
Does open exist?
YES
Go to step 9.
NO
Refer to TM 9-1230-476-20-2 to
troubleshoot multiplex
subsystem.
8. Check for open between:
P579–1 and P579–2,
P579–1 and P579–3.
Does open exist?
YES
Replace oil system 1 heat
exchanger pressure transducer
(TM 1-1520-238-23).
NO
Repair open wire between:
P673–95 and J579–1,
P673–111 and J579–2,
P673–110 and J579–3,
P673–94 and J579–3.
Go to paragraph 6–13.
9. Check for short between:
P579–1 and ground,
P579–2 and ground,
P579–3 and ground.
Does short exist?
YES
Replace oil system 1 heat
exchanger pressure transducer
(TM 1-1520-238-23).
NO
Repair shorted wire between:
P673–94 and J579–3,
P673–95 and J579–1,
P673–110 and J579–3,
P673–111 and J579–2.
Go to paragraph 6–13.
END OF TASK
