United Airlines Flight 433, a Boeing 737-800, with 139 passengers and 6 crew members on board. The plane took off from San Francisco International Airport at approximately 10:20 that morning and landed at Medford International Airport in Oregon at 11:36.
The missing fuselage panel was located on the lower side of the plane where the wing meets the fuselage, next to the landing gear. United said it would "thoroughly inspect the aircraft and perform repairs as part of an investigation to understand how the damage occurred"