AIRSPEED UNRELIABLE Message (19 Dec 2015)
During cruise at approximately 40,000 feet, messages FLIGHT CONTROL MODE, STALL WARNING SYS, AUTOPILOT DISC, NO AUTOLAND, and AIRSPEED UNRELIABLE showed. Crew completed the AIRSPEED UNRELIABLE checklist and diverted to the nearest suitable airport with an uneventful landing. Upon landing, all messages cleared. AHM data show that both engines (GE) were in Ice Crystal Icing accommodation mode and investigation has preliminarily concluded that this event was caused by icing.