If you look at the Fightaware plots for previous days, there is consistency in the data. Noteably, there is ADS-B coverage for the entire sector...for previous flights. So ADS-B coverage is complete and the flight hasn't gone into a ADS-B 'blindspot' and then failed to come out again. It has just stopped transmitting ADS-B data. From then on Flightaware asesses it's expected position unless it receives further real data from the aircraft, which in this case it never did.
Last edited by Lord Farringdon; 19th May 2016 at 08:45.
Reason: spelling