TM 1-1520-238-T-4
493
415.
TORQUE SHARING SYSTEM MAINTENANCE OPERATIONAL CHECK (cont)
415
2. Complete the maintenance operational check as follows:
Task
Result
a. On the pilots instrument panel (fig. 434),
ensure Np1, Np2, and NR vertical scales on
the ENGRTR RPM% indicator all indicate
100%.
If ENGRTR RPM% indications do not show 100%,
refer to TM 1-1520-238-T-5 to troubleshoot engine
instruments.
b. Monitor that TORQUE % 1 and 2 vertical
scales and digital readouts indications are
within 5% of each other.
If engine 1 TORQUE indication is lower than engine 2
TORQUE indication (indications not within 5% of each
other), refer to TM 1-1520-238-T-3, Multiplex Read
Codes, and perform troubleshooting. Then, if no fault
is found, go to paragraph 417.
If engine 2 TORQUE indication is lower than engine 1
TORQUE indication (indications not within 5% of each
other), refer to TM 1-1520-238-T-3, Multiplex Read
Codes, and perform troubleshooting. Then, if no fault
is found, go to paragraph 418.
c. Perform limited test flight to verify TGT
limited power check (TM 1-1520-238-MTF).
3. Land and shut down helicopter (TM 1-1520-238-CL).
4. Perform helicopter safing procedures (TM 1-1520-238-23).
END OF TASK
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