The performance study calculated the airplane’s airspeed to be 240 kt. when the roll began, and its roll rate to be 5 deg. per second. This roll rate was significantly less than the roll rate achieved during flight test of the Tamarack Atlas system.
The task of trying to understand what caused the roll of a Cessna 525A and why the pilot failed to recover from it took the National Transportation Safety Board almost three years. In the end, they were able to provide only partial answers.
