TM 55-1520-240-T
7-7.3 ENGINE HYDRAULIC STARTING SYSTEM
OPERATIONAL CHECK
7-7.3
Equipment Condition:
INITIAL SETUP
TM 55-1520-240-23:
Applicable Configurations:
Battery Connected
Electrical Power On
AII
Hydraulic Power On
Tools:
Ignition Switch Key Removed
None
General Safety Instructions:
Materials:
None
Make sure that rotor blades are
Personnel Required:
clear of obstructions and that
67U10 Medium Helicopter Repairer
personnel are aware that rotor
67U20 Medium Helicopter Repairer
blades may turn during engine
motoring. Turning blades can
References:
cause damage or serious injury to
TM 55-1520-240-23
personnel.
TASK
RESULT
1. Check that ENGINE NO. 1 START&
TEMP circuit breaker (1) is closed.
If START & TEMP circuit breaker (1) is open, close
it. If it opens again, go to task 4-4.6.
If START & TEMP circuit breaker (2) is open, close
it. If it opens again, go to task 4-4.8.
2. Check that ENGINE NO. 2 START&
TEMP circuit breaker (2) is closed.
Light (3) shall momentarily come on. If it does not
light, go to task 4-4.9.
3. Press and release ENGINE 1 STARTER
ON light (3).
Light (4) shall momentarily come on. If it does not
light, go to task 4-4.10.
4. Press and release ENGINE 2 STARTER
ON light (4).
MOTOR NO. 1 ENGINE
5. Set ENGINE 1 START switch (5) to MO-
TOR.
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 ON light does not come on,
go to task 4-4.9. If engine does not motor, go to
task 7-7.4.
NO. 1 ENGINE gas producer tachometer (6) in-
dication shall decrease to 0. If tachometer indica-
tion does not decrease or engine continues to mo-
tor, go to task 7-7.5.
6. Set ENGINE 1 START switch (5) to
OFF.
D145 8391 SPA
45 x 54
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