PC-12
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Commercial; Flight Crew Sea
Flight Crew Last 90 Days 35; Flight Crew Total 1675; Flight Crew Type 707
Troubleshooting; Workload; Distraction; Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation - Altitude Excursion From Assigned Altitude; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Loss Of Aircraft Control
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Returned To Clearance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Regained Aircraft Control
Aircraft; Weather
Flying from ZZZ to ZZZ1 the Propeller Heat System Failed. I was still climbing through a layer which appeared to top at about 24000 feet. I was assessing the warning and CAWS (Central Advisory and Warning System) indicating that the Prop Heat failed and following the QRH; when the autopilot began banking the aircraft to the right and nose down. I disconnected the autopilot and hit the trim interrupt switch to ensure to have full control over the aircraft. Once I was back straight and level; ATC inquired why we had descended and if we were okay. I was able to climb out of icing and proceeded back on course.
PC-12 Pilot reported the Propeller Heat System failed while climbing through icing conditions causing a temporary loss of control.