APU HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK

APU HYDRAULIC STARTING SYSTEM VISUAL CHECK (Continued)

APU START ACCUMULATOR GAGE DOES NOT INDICATE AT LEAST 3000 PSl

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 7-8.3 APU HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK 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 7-8.2) TASK R E S U LT 1. Check APU start accumulator 2. Start APU. Refer to task 15-1.4. 3. Stop APU. Refer to task 15-1.4. gage (1). Gage (1) shall indicate at least 3000 psi. If it does not, use hand pump to charge accumulator. If gage still does not indicate at least 3000 psi, go to task 7-8.4. APU shall begin to motor and accelerate to run- ning speed within 30 seconds. UTILITY HY- DRAULICS indicator (2) shall indicate 3200 to 3500 psi. If indicator does not indicate 3200 to 3500 psi, stop apu and go to task 7-2.4. If APU does not motor, go to task 7-8.5. If APU motors but does not start, go to task 15-1.9. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23 7-8.3 7-212 Change 1

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