just a mushy flight and sloppy controls while losing 1000' fpm.
30 years ago when it was probably 7-10 years old.
Repairs, rebuilds, overhauls, CG change due to major repairs, flight control rigging....
These can all change the stalling behavior of an airplane.
I’ve got my share of instructing in old and bent beater aircraft.
Later..much later I realised some of the aircraft were not legally airworthy anymore no matter what was signed off by MX.
If the airplane stall behavior is no longer on par with the certification requirements then its no longer airworthy.
I always made sure my student would solo in the same tailnumber as their last training flight.
I would avoid certain airplanes for solo flight and only use them for dual cross countries.
I’ve flown aircraft that would drop a wing with very little or no warning.
Aircraft that would only spin in one direction no matter what.
This could have been a sloppy turn that may very well have had no consequences in another airplane of the same type or in the plane she was more familiar with.