Primary finding
Probable cause
An in-flight collision with a bird while on approach.
Investigator assessment
Analysis narrative
The flight instructor reported that, while in the airport traffic pattern and turning from the downwind leg to the base leg, a bird impacted the leading edge of the left wing, which resulted?in substantial damage. The pilot receiving instruction continued to fly the approach, and landed on the intended runway without further issue. The flight instructor reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.