Oct. 19, Camp Springs, Md. / Cessna 172

At about 14:15 eastern time, a Cessna 172M was damaged when it encountered wake turbulence from a Boeing 757-200, operated by the US Air Force, about 4 miles south of Andrews Air Force Base. The pilot was not injured. The pilot said he was cruising from Cambridge, Md., to Friendly, Md., and was passing south of Andrews AFB. Both airplanes were advised of each other and the pilot of the Cessna was given a wake turbulence advisory. As the pilot of the Cessna neared a point behind the Boeing, he climbed from 1,300 feet to 1,600 feet, at which point the airplane encountered turbulence and rolled to the left. After landing, the pilot noticed wrinkles and deformed skin on the top surface of the right wing, and on the left aileron.