APU HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK

APU HYDRAULIC STARTING SYSTEM VISUAL CHECK

APU HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK (CONTINUED)

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 15-4.8 APU HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK 15-4.8 INITIAL SETUP Applicable Configurations: All Tools: None Materials: None Personnel Required: Medium Helicopter Repairer (2) References: TM 55-1520-240-23 Equipment Condition: TM 55-1520-240-23: Battery Connected Electrical Power Off Hydraulic Power Off Visual Check of Apu Hydraulic Starting System Performed (Task 15- 4.7) TASK RESULT 1. Check APU start accumulator gage Gage (1) shalI indicate between 2850 and (1). 3100 psi. If it does not, use hand pump to charge accumulator. If gage still does not in- dicate between 2850 and 3100 psi, go to task 15-4.9. 2. Start APU. Refer to task 15-1.5. APU shall begin to motor and accelerate to running speed within 30 seconds. UTILITY HYDRAULICS indicator (2) shall indicate 3200 to 3500 psi. If indicator does not indicate 3200 to 3500 psi_tstop apu and go to task 7-2.4. If APU does not motor, go to task 15-4.10. If APU motors but does not start and ESU bite task 15-4.11. 3. Stop APU. Refer to task 15-1.5. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23 G O T O N E X T P A G E 15-76 Change 8

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