FAB-620 is a bit of a mystery bird. It was involved in a mid-air collision with FAB-619, causing the crash of the latter on 10 October 1982. Later it was seen in use as an instructional airframe at PMA in Cochabamba marked FAB-620 from 1994 to 1997 at least. In 2015 it was reported without serial. It used to be tied to former Canadian 21115 but that was struck off charge in November 1959 after a crash.