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ENGINE OIL TEMPERATURE INDICATING SYSTEM VISUAL CHECK
ENGINE OIL TEMP CIRCUIT BREAKER DOES NOT STAY CLOSED

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







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