High Quality Content by WIKIPEDIA articles! Southwest Airlines Flight 812 (SWA812, WN812) was a scheduled US passenger aircraft flight between Phoenix, Arizona (PHX) and Sacramento, California (SMF). On April 1, 2011, the Boeing 737–300 operating the route made an emergency landing in Yuma, Arizona after a 6 ft (1.83 m) hole appeared in the top of the airplane`s fuselage above the cabin. A rapid depressurization at 34,400 ft (10,485 m) ensued and the crew performed an emergency descent.