Occurrence Details
On 3 February 2016, a Jazz Aviation DHC8-100 aircraft was operating a scheduled passenger flight under Instrument Flight Rules from Montréal-Pierre Elliott Trudeau International Airport, Quebec (CYUL) to Mont-Joli Airport, Quebec (CYYY). The aircraft carried 24 passengers and 3 crew members.
Flight and Weather Conditions
During the descent in icing conditions, a layer of ice developed on the aircraft surfaces. The de-icing system appeared to function normally during the initial part of the descent.
Control Loss and Recovery
On final approach, the aircraft encountered turbulence and wind shear, resulting in a loss of elevator control. The pilot-in-command increased airspeed and successfully regained control of the aircraft. The crew then proceeded to land without further incident. No injuries or damage were reported.
Post-Flight Inspection
After landing, the crew discovered that the de-icing system had not operated on either the left wing or the left horizontal stabilizer. The aircraft's de-icing system failure on the left-hand surfaces was noted.