Dynon Avionics SkyView HDX Series, Руководство по обслуживанию, Страница: 122 / 128

Page | 122 SkyView HDX System General Maintenance Manual, Revision F
9.7 Zero Pressure IAS/AoA Calibration
This calibration samples pitot, static, and AoA pressures. It should be performed before the AoA
calibration. Calibration should be performed in a windless environment to allow the SkyView
HDX system to provide the best possible Indicated Airspeed (IAS) readings at very low
airspeeds.
•
To calibrate, go to SETUP > HARDWARE CALIBRATION > ADAHRS CALIBRATION >
ZERO PRESSURE IAS/AOA CALIBRATION and follow the on-screen instructions.
9.8 AoA Calibration
Perform the following calibration after the Zero Pressure IAS/AoA Calibration. If a Dynon
Avionics AoA/Pitot Sensor is re-installed, a calibration is required. This calibration is performed
while flying.
•
Once you are flying straight and level at a safe altitude for stalls, go into the AoA
Calibration Wizard (IN FLIGHT SETUP MENU > AOA CALIBRATION) and follow the
onscreen instructions to calibrate angle of attack while in flight.
9.9 Transponder Tests
The transponder must be tested and inspected per FAR 91.413 and AC 43.13-1B.
Post-installation tests should be carried out in accordance with your certification requirements.
These tests should include the following:
•
Mode-S interrogations to verify correct address programming.
•
Verification of the reported altitude using a static tester.
•
Where installed, verification of correct squat switch ground/airborne indications. In an aircraft
with a squat switch, setting the Mode switch to ALT when the aircraft is on the ground should
leave the Transponder in GND mode; when the aircraft becomes airborne, the mode should
switch automatically to ALT.
•
Interrogations to verify the receiver sensitivity. A Mode-S transponder should have a
minimum triggering level (MTL) of between -77 dBm and -71 dBm. Failure to meet this
requirement usually indicates antenna or coaxial cable problems.
•
Interrogations to verify the transmitted power. A Class 1 installation should have no less than
125 Watts at the antenna (and no more than 500 Watts). A Class 2 installation should have
no less than 71 Watts at the antenna (and no more than 500 Watts). Failure to meet this
requirement is also generally due to antenna or wiring issues.
•
Verification of the GPS position source and ADS-B outputs. Whenever a valid position is
received by the Transponder and it is in any mode other than Standby, ADS-B Extended
Squitter should be observed on the Transponder test set.
9.9.1 Manual ALT/GND Mode Switching
Transponder checks require manual switching to ALT and GND mode.
1. The Transponder is normally configured to automatically switch between GND and ALT
mode, based on airspeed and other parameters
– SETUP MENU > TRANSPONDER