were as a result of unusual attitudes and subsequent compressor stalls which earlt Jet engines were prone too.
Maybe, however I have nearly 6000 hours in Command in these airplanes, no compressor stalls experienced.
Extreme nose up sounds like either....
Runaway stab (happened quite often, in my experience) altho, if caught quick enough, easily stopped, and trim established with split spoilers...
Mis-trim...or mis-loading,
Shifting cargo, altho unlikely here, as...if it goes thru the door, it goes on.
Many variables.