TM 55-1520-240-T
15-5.5 ENGINE HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK
15-5.5
INITIAL SETUP
Equipment Condition:
Applicable Configurations:
TM 55-1520-240-23:
Without 74
Battery Connected
Electrical Power On
Tools:
Hydraulic Power On
None
Ignition Switch Key Removed
Materials:
General Safety Instructions:
None
Personnel Required:
Medium Helicopter Repairer (2)
WARNING
References:
Make sure that rotor blades are clear of
TM 55-1520-240-23
obstructions and that personnel are
aware that rotor blades may turn dur-
ing engine motoring. Turning blades
can cause damage or serious injury to
personnel.
TASK
RESULT
1.
Check that ENGINE NO. 1 START & TEMP circuit
If START & TEMP circuit breaker (1) is open, close it. If it
breaker (1) is closed.
opens again, go to task 4-4.6.
2.
Check that ENGINE NO. 2 START & TEMP circuit
If START & TEMP circuit breaker (2) is open, close it. If it
breaker (2) is closed.
opens again, go to task 4-4.8.
3.
Press and release ENGINE 1 STARTER ON light (3).
Light (3) shall momentarily come on. If it does not light, go
to task 4-4.9.
4.
Press and release ENGINE 2 STARTER ON light (4).
Light (4) shall momentarily come on. If it does not light, go
to task 4-4.10.
MOTOR NO. 1 ENGINE
5.
Set ENGINE I START switch (5) to MOTOR.
ENGINE 1 STARTER ON light (3) shall come on. NO. 1
ENGINE gas producer tachometer (6) shall indicate 10 to
15% N1 as starter motors engine. If ENGINE 1 STARTER
light does not come on, go to task 4-4.9. If engine does
not motor, go to task 15-5.6.
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15-96 Change 23
