TM 55-1520-240-T8-3.3ENGINE OIL PRESSURE INDICATING SYSTEM OPERATIONAL CHECK8-3.3INITIAL SETUPReferences:-Applicable Configurations:TM 55-1520-240-10AllTM 55-1520-240-23Tools:Equipment Condition:NoneTM 55-1520-240-23:B-Battery ConnectedMaterials:Electrical Power OnNoneHydraulic Power OnPersonnel Required:Engine Oil Pressure Indicating System Visual CheckRotary Wing Aviator (2)Performed (Task 8-3.2)Medium Helicopter RepairerTASKRESULT1.Check that ENGINE NO. 1 OIL PRESS circuit breakerIf OIL PRESS circuit breaker (1) is open, close it. If it(1) isclosed.opens again, go to task 8-3.4 or 8-3.4.1.2.Check that ENGINE NO. 2 OIL PRESS circuit breakerIf OIL PRESS circuit breaker (2) is open, close it If it(2) isclosed.opens again, go to task 8-3.4 or 8-3.4.1.3.Check that NO. 1 ENGINE OIL PRESS AND NO. 2If either indicator (3 or 4) does not indicate 0, go to taskENGINE OIL PRESS Indicators (3 and 4) indicate0.8-3.5.CHECK NO. 1 ENGINE SYSTEM4.Havepilotoperate No. 1 engine to GROUND IDLE.Indicator (3) shall indicate 20psi minimum with pointerCheck NO. 1 ENGINE OIL PRESS indicator (3).fluctuations less than 5psi. If indication is below 20psi oris 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 SYSTEM6.Havepilotoperate No. 2 engine to GROUND IDLE.Indicator (4) shall indicate 20psi minimum with pointerCheck NO. 2 ENGINE OIL PRESS indicator (3).fluctuations less than 5psi. If indication is below 20psi oris fluctuating more than 5psi 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 TASK8-46 Change 19
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