Pure speculation at this point
If the detailed records never existed re what G-forces were applied (from which can be inferred loading on the horizontal stabilizer), then maybe only interviews of people who flew in the plane in years past could reveal whether it was subjected to abuse. (I happened to see a scene in a new TV show, 'Cupertino', where a character was showing off how his plane could be used as an amusement ride... He would sit on a slippery pad, in the aisle, at takeoff and landing, to slide down the length of the aisle. I suppose the writers did not make that up entirely, but based it on stories they had heard.) You are absolutely right about the value of human testimony in these scenarios. When technical data logs are lacking or incomplete, eyewitness and passenger interviews become a crucial pillar of an NTSB investigation. [ 1 ] Investigators frequently interview former corporate passengers, flight attendants, and past crew members to build a profile of an aircraft's operational histo...