TM 55-1520-240-T
8-2.3
GAS PRODUCER TACHOMETER SYSTEM OPERATIONAL CHECK
8-2.3
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-10
All
TM 55-1520-240-23
Tools:
Equipment Condition:
None
TM 55-1520-240-23:
Materials:
Battery Connected
None
Electrical Power On
Personnel Required:
Hydraulic Power On
Rotary Wing Aviator
Visual Check of Gas Producer Tachometer System
Aircraft Electrician
Performed (Task 8-2.2)
TASK
RESULT
1.
Have pilot motor NO. 1 ENGINE.
(Without 74 ) No. 1 gas producer tachometer shall
indicate more than 10 percent. If it does not, but is
accompanied by the sounds of a normal engine start, go
to task 8-2.4. If tachometer fluctuates or is erratic, go to
task 8-2.6. If the start attempt is not accompanied by the
sound of a normal engine start, go to task 4-4.11.
(With 74 ) No. 1 gas producer tachometer shall indicate
a nominal reading between 10 and 15 percent. If it does
not, go to task 8-2.4.1. If tachometer reading fluctuates or
is erratic, go to task 8-2.6.1.
2.
Have pilot motor NO. 2 ENGINE.
(Without 74 ) No. 2 gas producer tachometer shall
indicate more than 10 percent. If it does not, but is
accompanied by the sounds of a normal engine start, go
to task 8-2.5. If tachometer fluctuates or is erratic, go to
task 8-2.7. If the start attempt is not accompanied by the
sound of a normal engine start, go to task 4-4.15.
(With 74 ) No. 2 gas producer tachometer shall indicate
a nominal reading between 10 and 15 percent. If it does
not, go to task 8-2.5.1. If tachometer reading fluctuates or
is erratic, go to task 8-2.7.1.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Engines shut down.
Hydraulic power off.
Electrical power off.
Battery disconnected.
A65272
END OF TASK
8-32 Change 19
