Photo: Brett Critchley / TNS
A mechanical problem forced a United Airlines aircraft to return Washington DC with an emergency landing at San Francisco International Airport on Monday morning less than an hour after departure  United Airlines Flight 516 flew to Washington-Dulles International Airport at 9:23 am, but the aircraft had an unknown mechanical problem during the flight, United spokesman Madhu Unnikrishnan said. The plane turned around and landed safely at SFO at 10:09.
Fixed the issue and expects the flight to depart San Francisco a second time around noon today, Unnikrishnan said.
SFO officials expected 70,000 travelers to leave through the airport on Monday.