ICON A5 MM : Instruments (and Avionics) : Pitot-Static-Angle of Attack (AOA) System : Inspection Instructions : Pitot-Static-AOA Leak Test Procedures
Pitot-Static-AOA Leak Test Procedures
100461-01
Use the following procedures any time a pitot-static or AOA tube is disconnected. An alternative procedure may be used to test the pitot-static system only. The AOA system test must use a pitot-static test unit.
Applicable Aircraft Serial Numbers
All
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
Preston PS-525 Pitot-Static Test Set (or equivalent)
ITW Tacky Tape
Parts Required
None
Aircraft System and Number
10—Instruments (and Avionics)
Safety Equipment
As Needed
Consumables
None
The Preston PS-525 Pitot-Static Test Set is used to check for leaks in the pitot-static and AOA systems. Other equivalent pitot-static test instruments may also be used, and the procedures for them should be similar. When using a different test set, use these procedures as guide for test methodology while referring to the manufacturer’s instructions.
It is acceptable to create connections using alternate means than shown in these procedures so long as they are confirmed to be leak free.
It is preferable that a calibrated test set be used, but if not readily available, the pitot-static system can be tested with simple tools such as a syringe. (Pitot Static Leak Check Operation)
The AOA system test must use a pitot-static test unit since there is no in-line airspeed or altimeter to use as a pressure reference.
The procedures given within this section describe in detail how to complete the leak testing procedures. (Pitot-Static-AOA Leak Test Procedures) Record the results of each of the tests in the Verification Method section below.
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.
Task Instructions
1. Perform the pitot-static tester setup. (Preston Pressure Pitot-Static Tester Set-Up) Record the results in the Verification Method section below.
Note: 
There is an alternative procedure if the test equipment is not available.
2. Perform the pitot-static leak check or alternative pitot-static leak check operation. (Alternate Pitot-Static Leak Test Procedure) Record the results in the Verification Method section below.
3. Perform the AOA system testing. (Angle of Attack (AOA) Leak Check ProcedureAOA System Testing) Record the results in the Verification Method section below.
Verification Method
Complete the following information as the test procedures above are being completed.
FAR Part 25.1325 states that the static system may not leak more than 100 ft in one minute after starting at 1,000 ft above ambient pressure. The ICON flight test standard is 50 ft for the altimeter and AOA tests, and 5 knots for the airspeed test as conducted above.
Check that each of the numbers in the results is within ICON limits.
Test Details
Date of Test:__________
Initials of Technician:__________
Pitot Leak Check
Total amount of leak during the test:__________kts
Static Leak Check
Total amount of leak during the test:__________ft
AOA Leak Check
Total amount of leak during the test:
Upper Port:__________ft
Lower Port:__________ft
If the system is outside of ICON limits, then there is a leak in the pitot-static system and the full system must be inspected and all leaks repaired.