Caravan 208B
Flight Crew Commercial
Ground Event / Encounter Loss Of Aircraft Control
Air Traffic Control Provided Assistance; Flight Crew Regained Aircraft Control; Flight Crew Requested ATC Assistance / Clarification
Airport; Weather
Landed XX back taxied on XX; right turn onto runway XY/XZ. Airport maintenance advised via CTAF to back taxi XY/XZ with a left turn due to snow drifts that had developed very quickly. While back taxiing on runway XY/XZ due to lack of tire traction and rudder effectiveness because of runway ice and wind were unable to make the turn onto [the] taxiway. The aircraft would not turn and the wind was causing it to slide to the left due to the crosswind component. In response; the safest course of action was to shut down the engine to eliminate the pulling thrust vector to stop the aircraft and let it weathervane into the wind. This successfully brought the aircraft to a controlled stop. We contacted airport maintenance on Unicom stating that we require a tug to the hanger. At this point airport maintenance informed us that they were placing a NOTAM that runways were closed. Passengers were picked up and taken to the terminal in a crew car. We secured the aircraft for tow while waiting for a suitable tug to tow the aircraft. Airport maintenance had informed us that they intended on closing the runways before we arrived but were distracted with task of snow plowing. The aircraft was tugged back to the terminal and stowed safely in the hangar.The combination of wind and ice on the airport surface compromised the ability to safely taxi the aircraft on the surface under its own power; requiring a tug.The only way to stop the aircraft due to nil braking action was to shut off the engine because even at idle the aircraft produced enough thrust to slide forward with brakes applied. This allowed the aircraft to weather vane and come to a complete stop over the runway.Airport maintenance [should] be more prompt with runway and taxiway closures.
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C208 flight crew reported loss of directional control during taxi.