United Airlines flight from San Francisco to Honolulu returns to SFO after possible in-flight emergency

SAN FRANCISCO -- A United Airlines flight from San Francisco to Honolulu returned to San Francisco International Airport Wednesday afternoon following whats appears to be an in-flight emergency. United flight UA2380 transmitted a code of 7700 indicating an emergency situation. As of 1:10 p.m., the plane was off the coast of Half Moon Bay. According to FlightAware, flight 2380 landed back at SFO at 1:30 p.m. The plane landed safely and video from a helicopter did not show any smoke or other mechanical issues with the twin-jet Boeing 757-300. The...