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1-63 SERVICE FLIGHT CONTROL SYSTEM ACCUMULATOR    (Continued) - TM-55-1520-240-23-1_271
O1-64 SERVICE UTILITY SYSTEM APU START ACCUMULATOR    (Continued)

TM-55-1520-240-23-1 UH-1H/V and EH-1H Aircraft Manual
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TM 55-1520-240-23-1 1-64 SERVICE UTILITY SYSTEM APU START ACCUMULATOR 1-64 INITIAL SETUP Applicable Configurations: All Tools: Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692 Source of High-Pressure Compressed Air or Nitrogen, With 0-3000 PSI Air Gauge and Pressure Regulator Torque Wrench, 30-150 Inch-Pounds Materials: None Personnel Required: CH-47 Helicopter Repairer Inspector Equipment Condition: Battery Disconnected (Task 1-39) Electrical Power Off Hydraulic Power Off Emergency Utility Pressure Valve at Normal (TM 55-1520-240-T) Cargo Ramp Open and Level (TM 55-1520-240-T) WARNING Prior to checking or servicing APU start accumulator, visually check to ensure pressure gauge vent hole is free of all obstructions.  There shall not be anything covering vent hole. 1. Measure and record outside air temperature. Use fat gauge (1) in cockpit. 2. Press depressurization valve (2) on APU start module (3).  Hold valve until sound of depressurizing has stopped. Change 3 1-245







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