Thanks for the replies. Another article re "the luckiest man" mentions that he fell from 800 m after the airplane's rear door suddendly opened. A website listing
Yugoslav aviation accidents gives no furter clues, there wasn't even a crash in 1963 and there were no fatalities in the two DC-3 mishaps nearest to that year. JAT flew Caravelles and Convairs at that time, no DC-8s.
Vesna Vulovic was once a household name in the region. In a recent interview she alleges to have been pinned down by the catering trolley in the mid-section of the fuselage (which she later learned from her rescuer).
A few more similar accounts:
Wreckage riders ,
Free fallers