A Turkish pilots' group claims turbulence from a large plane landing at Amsterdam airport may have caused the crash of a Turkish Airlines flight in which nine people died. Associated Press quoted Turkey Airline Pilots' Association Secretary-General Savas Sen as saying late Friday that a large Boeing 757 had landed at Schiphol Airport two minutes earlier. Sen said that plane most likely created «wake turbulence» that hampered the Turkish aircraft's landing. Wake turbulence forms behind an aircraft as it passes through the air. Nine people, including three pilots and a flight attendamt, were killed when the flight from Istanbul to Amsterdam suddenly lost speed and crashed a mile short of the runway on Wednesday.