My ADS-B install

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blsewardjr
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Re: My ADS-B install

Post by blsewardjr » Wed Aug 21, 2019 8:01 pm

Steve- Given your setup with the USB connector accessible, would it be practical to change the tail number for, e.g., an Angel Flight, then change it back to your tail number? If so, is the GDL 8X install tool available on line? I'm looking for a way to change the tail number in my GDL-84 for this purpose. Thanks.
Bernie Seward, IR, AGI
2003 DA40 N377DS
KCHO Charlottesville, VA
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Steve
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Re: My ADS-B install

Post by Steve » Wed Aug 21, 2019 8:30 pm

Bernie:

You could change the tail number using the GDL 8X install tool, which is available on line. Not sure of the legality of this.

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Re: My ADS-B install

Post by blsewardjr » Wed Aug 21, 2019 8:59 pm

On newer ADSB out units, e.g., the GTX-345, this is easily done. The problem I'm running into is that according to the FAA's Chief Counsel, you must file and use the tail number that your ASDB broadcasts when you're using ATC services. Thus, those of us who can't change their tail number on their ADSB to the unique Angel Flight tail number/call sign can't fly as an Angel Flight in the IFR system. Not a huge deal -- I still fly Angel Flights -- but I can't identify myself as one and receive upgraded ATC services.
Bernie Seward, IR, AGI
2003 DA40 N377DS
KCHO Charlottesville, VA
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Rich
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Re: My ADS-B install

Post by Rich » Wed Aug 21, 2019 11:03 pm

blsewardjr wrote:
Wed Aug 21, 2019 8:59 pm
On newer ADSB out units, e.g., the GTX-345, this is easily done. The problem I'm running into is that according to the FAA's Chief Counsel, you must file and use the tail number that your ASDB broadcasts when you're using ATC services. Thus, those of us who can't change their tail number on their ADSB to the unique Angel Flight tail number/call sign can't fly as an Angel Flight in the IFR system. Not a huge deal -- I still fly Angel Flights -- but I can't identify myself as one and receive upgraded ATC services.
Some (most? all?) Mode S transponders (of which 1090ES transponders are a superset) have a ready way to set Flight ID to something other than N-number. UAT systems used with Mode S transponders should be slaved to the setting. You will see that for UAT systems anonymous mode is not compatible with Mode S transponders, as you'd be transmitting inconsistent data across the 2 information streams.

If you think about airliners, you will typically see on the traffic display something like "UA3866" arriving into, say, SEATAC. That same aircraft departing a couple of hours later might show as "UA193". My KT74 has ready access to a menu item to change this value. I don't know if UAT systems have this capability. Otherwise why is anonymous mode needed?
2002 DA40: MT, PF, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal.
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