The Let belonged to NOAR Airlines and something went wrong after take-off. The emergency landing ended in catastrophe as the aircraft burst into flames and the 16 people on board died. Picture at airliners.net by local spotter Wagner Damasio:
http://www.airliners.net/photo/NOAR-Lin ... 1950412/M/
edit: wel-informed sources (thanks!) now give the aircraft's identity as PR-NOB, instead of PR-NOA as was stated earlier. I adapted the topic-subject-lline accordingly.