High Quality Content by WIKIPEDIA articles! USAir Flight 1493 was a scheduled United States (US) domestic passenger flight from Syracuse Hancock International Airport, New York to San Francisco International Airport, California that collided with SkyWest Flight 5569 upon landing at a scheduled stopover at Los Angeles International Airport (LAX). The evening of Friday, February 1, 1991, saw slow to moderate air traffic at LAX, but as the USAir 737 was on final approach, there were a series of abnormalities that occurred to distract the local controller, including an aircraft that inadvertently switched off the tower frequency and a misplaced flight progress strip which resulted in the SkyWest Metroliner being told to taxi into takeoff position while the USAir flight was landing on the same runway without the Metroliner ever being given a takeoff clearance.