INSTRUMENTS (AND AVIONICS) / PITOT-STATIC-ANGLE OF ATTACK (AOA) SYSTEM 13-81
CHANGE C2 ICON A5 / MAINTENANCE MANUAL
13. Press Exit on the Altitude display.
14. Repeat the steps above for the lower AOA port.
15. Return the system to ambient pressures by carefully opening the Pressure Vent valve ensuring
not to exceed 4,000 ft/min on the Altitude display.
16. Carefully open the Vacuum Vent valve.
17. Carefully open the Vacuum Control valve until the Vacuum Reservoir indicator shows 0 inHg.
18. Repair the AOA system if needed and repeat the leak tests until both upper and lower AOA port
pass the test.
19. Open all valves for storage.
20. Turn the PS-525 tester unit power to Display Off.
21. Record the results of the AOA system leak check in the Verification Method form of the parent
task. (See “Pitot-Static-AOA Leak Test Procedures” on page 13-70.)
RELATED INFORMATION:
"Pitot-Static-AOA Leak Test Procedures" on page 13-70
13.8.1.1.4 Alternate Pitot-Static Leak Test Procedure
This procedure describes a method of testing the pitot-static system for leaks when a proper test
instrument is not available. This procedure CANNOT be used to test the AOA system.
TASK INFORMATION:
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
Plastic Syringe (at least 60 mL capacity)
Flexible PVC tubing that fits tightly over pitot tube
ITW Tacky Tape
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