INSTRUMENTS (AND AVIONICS) / PITOT-STATIC-ANGLE OF ATTACK (AOA) SYSTEM 13-75
CHANGE C2 ICON A5 / MAINTENANCE MANUAL
RELATED INFORMATION:
"Pitot-Static-AOA Leak Test Procedures" on page 13-70
13.8.1.1.2 Pitot Static Leak Check Operation
Instructions for conducting the pitot-static-AOA leak check with the test equipment.
CAUTION: The airspeed and altimeter are delicate instruments. Care must be
taken when applying pressure to the pitot-static system to avoid
pressures and rapid changes of pressure that could damage the
instruments.
1. On the front panel of the PS-525 tester, ensure that the Pressure Pump and Vacuum Pump
switches are both OFF.
2. Close the Pressure Control and Vacuum Control and Crossbleed valves by rotating clockwise
until they seat.
NOTE: DO NOT Over tighten the valves
3. Open the Pressure Vent and Vacuum Vent valves.
4. Ensure that the Pressure Reservoir and Vacuum Reservoir gages indicate 0 psi and 0 inHg
respectively.
5. Power on the PS-525 to 12 volts by pulling up on the power switch in the center of the box to
unlock, then swinging the switch down to +12 V.
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