The flight was cleared for a visual approach to Runway 28L at 11:21 a.m. PDT, and told to maintain a speed of until the aircraft was from the runway. At 11:26 a.m., Northern California TRACON ("NorCal Approach") handed the flight off to San Francisco tower. A tower controller acknowledged the second call from the crew at 11:27 a.m. when the plane was away, and gave clearance to land.
