Table 5-3 Airspeed Test Points - Garmin GI 275 Maintenance Manual

14. Starting at the current airspeed, decrease the airspeed to zero, stopping at each of the airspeeds
listed in Table 5-3 (airspeeds above Vne should not be checked), verifying that the ADI and
standby ASI airspeed values are within the tolerances indicated in Table 5-3.
5.14.2.2 Advanced Airspeed Tape Setting
If the Configuration Type is set to Advanced, verify correct operation of the internal ADAHRS as follows:
NOTE
If the internal ADAHRS and standby airspeed indicator are on separate pitot-static
systems, it is recommended to set up the test set so that both systems can be tested at the
same time, or separate tests must be completed for each system.
1. Power on the GI 275 system in Normal mode.
2. Using a pitot-static test set, increase the airspeed until the ADI airspeed tape pointer is at the
bottom of the white band (Vs0).
3. Verify that the bottom of the white arc/band on the standby ASI and ADI airspeed tape are at the
same airspeed value.
4. Increase the IAS throughout the range of the ASI – stop at the limits of all Arc Ranges, and at all
Marking values configured per the instructions in Table 5-4 and Table 5-5 and listed in the printed
configuration log.
5. Verify that the ranges and markings on the standby ASI and ADI are located at the same airspeed
values. The last value verified should be the beginning of the barber pole (Vne/Vmo/Mmo).
6. The following applies to Variable Vne/Vmo/Mmo aircraft only:
a. Decrease the IAS to 25 knots below the barber pole on the ADI. Increase the indicated altitude
to the maximum operating altitude or service ceiling. Verify that the barber pole on the ADI
and standby ASI are at the same airspeed (±5 kt). Decrease the airspeed as needed to ensure
the IAS does not exceed the barber pole during the simulated climb.
b. Decrease the indicated altitude (do not exceed vertical speed limitations) back to ambient
static pressure.
7. Starting at the current airspeed, decrease the airspeed to zero, stopping at all of the relevant
airspeeds listed in Table 5-3 (airspeeds above Vne should not be checked). Verify that the ADI and
standby ASI values are within the tolerances indicated.
190-02246-11
Rev. 1

Table 5-3 Airspeed Test Points

Test Set Airspeed (kt)
50
80
100
120
150
180
210
250
290
PFD Allowed Tolerance (kt)
±5.0
±3.5
±2.0
±2.0
±2.0
±2.0
±2.0
±2.0
±3.0
GI 275 Part 23 AML STC Maintenance Manual
Page 5-39