The National Transportation Safety Board Has Released A Preliminary Report On A Plane Crash At Tri Cities Airport. The NTSB Said Comment From Eyewitnesses Who Heard The Plane Sputter Before Flipping On Impact Mirrored Its Findings. The Report Said The Plane Slid 400 Feet Short Of The Runway Threshold. It Injured Richard Knapp And A Passenger. The Plane Was An Experimental Amateur-Built Velocity STD RG E Aircraft.