TM 55-1520-240-23-1
1-65
SERVICE UTILITY SYSTEM APU START MODULE ACCUMULATOR
1-65
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 Gage and Pressure Regulator
Torque Wrench, 30 to 150 Inch-Pounds
Materials:
Lockwire (E231)
Personnel Required:
Medium Helicopter Repairer
Inspector
Equipment Condition:
Battery Disconnected (Task 1-39)
Electrical Power Off
Hydraulic Power Off
Emergency Utility Pressure Valve to Open (TM
55-1520-240-T)
Cargo Ramp Open and Level (TM 55-1520-240-T)
1.
Measure and record outside air temperature.
Use fat gage (1) in cockpit.
2.
Press depressurization valve (2) on APU
start module (3). Hold valve until sound of
depressurizing has stopped.
3.
Read accumulator gage (4).
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