INSTRUMENTS (AND AVIONICS) / PITOT-STATIC-ANGLE OF ATTACK (AOA) SYSTEM 13-71
CHANGE C2 ICON A5 / MAINTENANCE MANUAL
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 proce-
dures. (See “Pitot-Static-AOA Leak Test Procedures” on page 13-70.) 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.
1. Perform the pitot-static tester setup. (See “Preston Pressure Pitot-Static Tester Set-Up” on page
13-72.) Record the results in the Verification Method section below.
NOTE: There is an alternative procedure if the test equipment is not avail-
able.
2. Perform the pitot-static leak check or alternative pitot-static leak check operation. (See “Alter-
nate Pitot-Static Leak Test Procedure” on page 13-81.) Record the results in the Verification
Method section below.
3. Perform the AOA system testing. (See “AOA System Testing” on page 13-79.) 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 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 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.
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