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ENGINE OIL PRESSURE INDICATING SYSTEM VISUAL CHECK (Continued)
ENGINE OIL PRESS CIRCUIT BREAKER DOES NOT STAY CLOSED - TM-55-1520-240-T-2_105

TM-55-1520-240-T-2 CH-47D Heilcopter Manual
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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







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