What happened
On July 8, 2015, a Pilatus PC12, registration N220CL, was participating in a pilot competency checkride at Belgrade, Montana. While on the downwind leg of the traffic pattern, the examiner requested a specific instructional maneuver: a zero-flap, power-off, 180-degree approach and landing.
As the aircraft approached the threshold, the pilot observed an airspeed higher than normal and an approach angle of attack that was greater than normal. In response, the pilot increased the angle of attack until the stick shaker activated, subsequently initiating a go-around maneuver. During this go-around, the aircraft's tail struck the runway. The pilot stated they did not recall feeling the impact. The aircraft sustained substantial damage to the rudder following the strike, though the pilot completed the maneuver without further incident. There were no injuries resulting from the event.
The investigation
The pilot reported that there were no mechanical failures or malfunctions involving the engine or airframe prior to the impact that would have prevented normal operation.