B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 94; Flight Crew Total 11034; Flight Crew Type 4844
Communication Breakdown
ATC Issue All Types; Conflict Ground Conflict; Critical; Ground Incursion Runway
Air Traffic Control Provided Assistance; Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action; General Flight Cancelled / Delayed
Procedure
Flying FMS Bridge Visual Runway 28R. At approximately 1;500 to 1;200 feet AGL; SFO Tower cleared Aircraft Y to cross Runway 28R. At either Taxiway U or R. Couldn't tell which one exactly. I looked over to the First Officer and asked him did he just clear that guy to cross the runway? Immediately SFO Tower told Aircraft Y to hold position. No answer. Tower then said Aircraft Y stop. No answer. I told First Officer to prepare for a go around. After a 3rd call from Tower; Aircraft Y was now in the middle of the runway. Tower then directed the go around. The FMS bridge visual has a specific go around procedure listed. Runway heading to 3;000 ft. That's not what the go around instructions given from Tower which was an added distraction. Next approach was uneventful.
B737 Captain reported that a communication breakdown between ATC and another aircraft resulted in a runway incursion and a go-around.