Regulatory Tests; Ads-B Out Test - Garmin GTX 335 w GPS Installation Guidance

7.3.2

Regulatory Tests

With the transponder operating in normal mode and in an airborne state (refer to section 7.1.1), the
following regulatory tests are required to be performed. The Altitude Reporting Equipment Test is required
to be performed for each altitude source interfaced to the transponder, including the GAE.
These regulatory tests require the use of a Mode S transponder ramp tester such as an Aeroflex IFR-6000
or TIC TR-220. Specific instructions for operating the ramp tester are contained in the applicable
operator's manual.
1. Altitude Reporting Equipment Tests in accordance with 14 CFR Part 91.411 and Part 43
Appendix E.
2. ATC Transponder Tests and Inspections in accordance with 14 CFR Part 91.413 and Part 43
Appendix F.
7.3.3

ADS-B Out Test

The ADS-B Out test procedure requires the use of a Mode S transponder ramp tester such as an Aeroflex
IFR-6000 or TIC TR-220. Specific instructions for operating the ramp tester are contained in the
applicable operator's manual.
1. Verify the aircraft is in a location where a GPS signal is receivable (e.g., outdoors with a clear view
of the sky).
2. Power on the aircraft/avionics.
3. Verify the GPS source has acquired a position.
4. Verify the GTX transponder is in ADS-B TX mode.
5. Using the transponder test set, make sure the following ADS-B Out parameters are being
transmitted:
◦ Aircraft emitter category is Light Airplane < 15,500 pounds (On the TR-220 this is indicated
as "A1").
◦ Aircraft Length documented in the aircraft checkout log.
◦ Aircraft Width documented in aircraft checkout log.
◦ 1090 ADS-B In Capability matches the configuration setting documented in the aircraft
checkout log.
◦ UAT (978) ADS-B In Capability matches the configuration setting documented in the
aircraft checkout log.
6. Place the GTX transponder into airborne state (refer to section 7.1.1).
7. Select ALT mode on the GTX.
8. Using the transponder test set, verify the following ADS-B Out parameters are being transmitted:
NACv > 1
•
190-00734-17
Rev. 1
SDA > 2 SIL > 3
• •
NACp > 8
•
GTX 335 w/GPS Installation Guidance
NIC > 7
•
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