TM 55-1520-240-T
8-3.3
ENGINE OIL PRESSURE INDICATING SYSTEM OPERATIONAL CHECK
8-3.3
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:
B-Battery Connected
Materials:
Electrical Power On
None
Hydraulic Power On
Personnel Required:
Engine Oil Pressure Indicating System Visual Check
Rotary Wing Aviator (2)
Performed (Task 8-3.2)
Medium Helicopter Repairer
TASK
RESULT
1.
Check that ENGINE NO. 1 OIL PRESS circuit breaker
If OIL PRESS circuit breaker (1) is open, close it. If it
(1) is closed.
opens again, go to task 8-3.4 or 8-3.4.1.
2.
Check that ENGINE NO. 2 OIL PRESS circuit breaker
If OIL PRESS circuit breaker (2) is open, close it If it
(2) is closed.
opens again, go to task 8-3.4 or 8-3.4.1.
3.
Check that NO. 1 ENGINE OIL PRESS AND NO. 2
If either indicator (3 or 4) does not indicate 0, go to task
ENGINE OIL PRESS Indicators (3 and 4) indicate 0.
8-3.5.
CHECK NO. 1 ENGINE SYSTEM
4.
Have pilot operate No. 1 engine to GROUND IDLE.
Indicator (3) shall indicate 20 psi minimum with pointer
Check NO. 1 ENGINE OIL PRESS indicator (3).
fluctuations less than 5 psi. If indication is below 20 psi or
is fluctuating more than 5 psi, go to task 8-3.6 or 8-3.6.1.
5.
Have pilot stop No. 1 engine.
Indicator (3) shall indicate 0.
CHECK NO. 2 ENGINE SYSTEM
6.
Have pilot operate No. 2 engine to GROUND IDLE.
Indicator (4) shall indicate 20 psi minimum with pointer
Check NO. 2 ENGINE OIL PRESS indicator (3).
fluctuations less than 5 psi. If indication is below 20 psi or
is fluctuating more than 5 psi go to task 8-3.7 or 8-3.7.1.
7.
Have pilot stop No. 2 engine.
Indicator (4) shall indicate 0.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Electrical power off.
Hydraulic power off.
Battery disconnected.
END OF TASK
8-46 Change 19
