Incident Overview
A pilot flying a small general aviation airplane on final approach to runway 19L experienced wake turbulence. The pilot had been cleared to land and advised to look for a Boeing 757 on a 4-mile final for the parallel runway 19R. After reporting the Boeing 757 in sight, the larger aircraft overtook him. The pilot stated he attempted to "stay high and land long on 19L." However, as the Boeing 757 touched down, the small airplane entered a "violent snap roll to the right, looking down at the ground." The airplane impacted the ground short of the runway.
Air Traffic Control Actions
During the approach, controllers allowed simultaneous operations on parallel runways by the Boeing 757 and the small general aviation airplane. According to FAA Order 7110.65N, a minimum distance between runway centerlines of 700 feet is required for simultaneous same direction operations between large aircraft and lightweight single and multiengine propeller driven airplanes. The distance between the centerlines of runways 19R and 19L is approximately 505 feet.