Incident
The SkyWest aircraft was arriving at SFO after a flight from Modesto, California, and was cleared for a visual approach to runway 28R by NorCal approach control. After being switched over to the tower controller, SkyWest was cleared to land on runway 28R. At the same time, the Republic Airlines aircraft, bound for Los Angeles, California was instructed to taxi into position and hold for two minutes before takeoff clearance was also granted on the intersecting runway 1L. As the landing SkyWest aircraft passed the runway threshold the Republic Airlines aircraft was cleared for takeoff. Local procedures and FAA Order 7110.65 require the local controller to wait until the landing aircraft has passed through the intersection before clearing an aircraft for takeoff on one of the intersecting runways.
Approximately 27 seconds later the Airport Movement Area Safety System (AMASS) issued an aural warning of an imminent collision, and the local controller attempted to instruct the SkyWest aircraft to stop, transmitting, "uh, sky-, skywest uhh fifty seven forty one HOLD HOLD HOLD". The SkyWest aircraft came to a stop in the intersection of runways 1L and 28R, while Republic Airlines flight lifted off and overflew it. The initial FAA tower report estimated the aircraft missed colliding by 300 feet; however the Skywest crew estimated the distance as 30 to 50 feet.
Read more about this topic: 2007 San Francisco International Airport Runway Incursion
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