Left engine thrust lever and corresponding left engine N1 decreasing. Pilots preocupied with ATC communication and bad weather, requesting heading change due to weather and then ATC ordering leveling off at 11.000 feet due to traffic. Further reduction in left engine thrust. AP disconnection followed by rapid left roll past 45 degrees. End of recording only 20 sec later.
No FDR readout provided in the report. Problems with the AT in the days before the accident.