TM 55-1520-240-T
8-4.3
ENGINE OIL TEMPERATURE INDICATING SYSTEM OPERATIONAL CHECK
8-4.3
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-23
All
Equipment Condition:
Tools:
TM 55-1520-240-23:
Aircraft Mechanic's Tool Kit,
Battery Connected
NSN 5180-00-323-4692
Electrical Power On
Materials:
Hydraulic Power Off
None
Engine Oil Temperature Indicating System
Personnel Required:
Visual
Medium Helicopter Repairer (2)
Check Performed (Task 8-4.2)
TASK
RESULT
NOTE
Check of engine oil temperature indicating system
should be performed only on cool engines.
1.
Check that ENGINE NO. 1 OIL TEMP circuit breaker
If OIL TEMP circuit breaker (1) is open, close it. If it opens
(1) is closed.
again, go to task 8-4.4.
2.
Check that ENGINE NO. 2 OIL TEMP circuit breaker
If OIL TEMP circuit breaker (2) is open, close it. If it opens
(2) is closed.
again, go to task 8-4.4.
CHECK NO. 1 ENGINE SYSTEM
3.
Check temperature indications on free air tempera
Temperature indications shall be within 10C. If not go to
ture indicator (3) and NO. 1 ENGINE OIL temperature
task 8-4.5 or 8-4.5.1. If a fluctuating pointer trouble
indicator (4).
symptom can not be verified, go to task 8-4.5 or 8-4.5.1.
CHECK NO. 2 ENGINE SYSTEM
4.
Check temperature indications on free air tempera-
Temperature indications shall be within 10C. If not, go to
ture indicator (3) and NO. 2 ENGINE OIL temperature
task 8-4.6 or 8-4.6.1. If a fluctuating pointer trouble
indicator (5).
symptom can not be verified, go to task 8-4.6 or 8-4.6.1.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery disconnected.
Electrical power off.
END OF TASK
8-64 Change 19
