General Aviation

Probable cause: The pilot’s improper preflight planning that did not identify the unserviceable runway; his subsequent decision to attempt to takeoff from the rough, grassy runway; and his selection of an abort point with insufficient runway remaining, which resulted in a runway overrun.

Probable cause: A loss of engine power due to carburetor icing, the pilot’s decision to turn back to the runway shortly after takeoff, and his failure to maintain airspeed during the turn, which resulted in an exceedance of the airplane’s critical angle of attack, and subsequent aerodynamic stall.