TM 55-1520-240-T
8-6.3.1 TORQUE INDICATING SYSTEM OPERATIONAL CHECK (Continued)
8-6.3.1
TASK
1.
Check that ENGINE NO. 1 AC TORQUE circuit breaker
(2) is closed.
2.
Check that ENGINE NO. 1 DC TORQUE circuit breaker
(1) is closed.
3.
Check that ENGINE NO. 2 AC TORQUE circuit breaker
(3) is closed.
4.
Check that ENGINE NO. 2 DC TORQUE circuit breaker
(4) is closed.
5.
Check No. 2 pointer on pilot (5) and copilot (6) torque
Indicators.
NOTE
If
pointer
is
spinning,
have
helper
manually turn rotor blades until spinning
stops. If spinning continues after one
revolution of the blades, go to next step.
6.
Check No. 1 pointer on pilot (5) and copilot (6) torque
indicators.
NOTE
If
pointer
is
spinning,
have
helper
manually turn rotor blades until spinning
stops. If spinning continues after one
revolution of blades, go to next step.
7.
Install electric torquemeter flight line test set on the
aircraft. Reference operating manual SE-876-01-1006.
8.
Perform an AIRCRAFT SYSTEM TEST. Reference
operating manual SE-876-01-1006.
9.
After completion of test(s), remove electric flight line
test set from the aircraft. Reference operating manual
SE-876-01-1006.
RESULT
If ENGINE NO. 1 AC TORQUE circuit breaker (2) is open,
close it. If it opens again, go to task 8-6.4.
If ENGINE NO. 1 DC TORQUE circuit breaker (1) is open,
close it. If it opens again, go to task 8-6.5.1.
If ENGINE NO. 2 AC TORQUE circuit breaker (3) is open,
close it. If it opens again, go to task 8-6.4.
If ENGINE NO. 2 DC TORQUE circuit breaker (4) is open,
close it. If it opens again, go to task 8-6.5.1.
No. 2 pointer on both torque indicators (5 and 6) shall be
below 10%. If not, adjust torque indicator to zero. (Ref
TM 55-1520-240-23.)
No. 1 pointer on both torque indicators (5 and 6) shall be
below 10%. If not, adjust torque indicator to zero. (Ref
TM 55-1520-240-23.)
Continue the tests or replace LRUs, depending upon the
results of the AIRCRAFT SYSTEM TEST. Reference
operating manual SE-876-01-1006.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery disconnected.
Electrical power off.
Hydraulic power off.
END OF TASK
Change 19 8-107
