Lauda Air Flight 004
At 23:17 PM ICT (4:17 PM UTC), some nine minutes after the master caution advisory, while climbing to FL310 as cleared, the left engine thrust reverser activated. Immediately after, the first officer acknowledged this, stating "Shit, reverser deployed," followed by loud bangs, snaps, and the sound of the overspeed siren. In just 4 seconds, the aircraft banked over 90 degrees to the left and began to descend as it shuddered with the aerodynamic forces. Captain Welch disconnected the autopilot (or it disconnected automatically because of the overbank) and takes manual control, which consisted of continuous sustained elevator nose up inputs. The aerodynamic stresses tore the tail section free of the aircraft, leaving it uncontrollable.