What happened
On November 28, 2018, a Pilatus PC12, registration N552TC, was taxiing from the ramp after receiving IFR clearance at an airport in Mesa, Arizona. During the turn onto the taxiway, the air traffic controller instructed the pilot to give way to another aircraft on the same taxiway. The pilot of the N552TC reported that he stopped the aircraft, looked left and saw a Cessna that had already passed him, and then looked right. Seeing no other aircraft, he continued taxiing. Shortly after, the pilot realized the propellers had struck an object, shut down the engine, and discovered he had struck a Cessna.
Simultaneously, a flight instructor in the Cessna was taxiing back to the ramp with a student pilot. The instructor reported that after being instructed by the controller to follow company traffic while passing another aircraft, he looked left and saw a spinning propeller approaching. The instructor attempted an evasive maneuver by applying right rudder, but the propeller of the Pilatus struck the Cessna's left wing.
There were no injuries resulting from the collision. The Pilatus sustained propeller damage, while the Cessna sustained substantial damage to its left wing.
The investigation
An airport authority video showed the N552TC taxiing left onto the taxiway from the ramp without stopping. The footage also confirmed the presence of another aircraft further down the taxiway.
Both the pilot of the Pilatus and the flight instructor in the Cessna reported that there were no mechanical failures or malfunctions in either aircraft that would have prevented normal operation prior to the collision.