Topic-icon ACSS Transponder with ADS-B Failure

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5 months 3 weeks ago - 5 months 3 weeks ago #657 by Mark D Francis
We had a failed ADS-B function of the left transponder system.

This was seen on the control head (bad image, but light indicates ADSB).



An ADS-B fault light was also present on the face of the transponder while performing a self test.



The problem was a failed GPS receiver in the cabin overhead.



This unit is manufactured by CMC Electronics . It provides highly accurate GPS positioning information to the transponders. The FMS's (Flight Management Systems) can also use positioning information from these receivers for GPS approaches and landings.

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Last edit: 5 months 3 weeks ago by Mark D Francis.

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5 months 3 weeks ago #658 by Thomas Richter
The internal troubleshooting ability of these modern electronics is amazing...atleast when it works the way its supposed to! And theres a reason there is redundancy built in! It appears there are 2 units ,is ADS-B a redundant system in all aspects?

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5 months 2 weeks ago #659 by Mark D Francis
Two of everything..... to ATC units each being fed data from it's own GPS receiver.

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