ICON A5 MM : Instruments (and Avionics) : Pitot-Static-Angle of Attack (AOA) System : Inspection Instructions : Pitot-Static-AOA Leak Test Procedures : Alternate Pitot-Static Leak Test Procedure
Alternate Pitot-Static Leak Test Procedure
100463-00
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.
Applicable Aircraft Serial Numbers
All
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
Parts Required
None
Aircraft System and Number
10—Instruments (and Avionics)
Safety Equipment
As Needed
Consumables
None
Task Instructions
1. Connect syringe to pitot port using flexible tubing pushed over the tip of the pitot tube.
2. Slowly apply pressure with the syringe until the airspeed indicator reads 100 knots. With 100 knots set, start timing while tapping glass of instrument.
3. Record the new airspeed reading result after one minute.
4. Remove test setup.
5. Adjust the altimeter baro setting until an even altitude is displayed.
6. Seal one instrument static port with tape.
7. Secure syringe to open static port with ITW Tacky Tape. Slowly apply suction (this will add suction to both the static and pitot sides at the same time) until a 1,000 ft increase in indicated altitude is displayed.
8. With the new altitude set, begin timing while tapping glass of instrument. After one minute, note the displayed altitude and record the results.
Date of Test:
Initials of Technician:
Airspeed Reading at Time 0 sec:
Airspeed Reading at Time 60 sec:
Altitude Reading at Time 0 sec:
Altitude Reading at Time 60 sec:
FAR Part 23.1325 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 test and 5 knots for the airspeed test as conducted above.
Verification Method
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.