Narrative:

A DC87 landing roll out on runway 28R was told to turn left at taxiway romeo and hold short of runway 28L. Cleared an A320 for takeoff on runway 28L; the DC87 continued west of runway 28L in front of the A320. The A320 aborted his takeoff on his own after seeing the DC87 crossing. The DC87 [should have] read back hold short of 28L.

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Original NASA ASRS Text

Title: SFO Tower Controller described an aborted takeoff on Runway 28L when observing an aircraft crossing down field without ATC approval.

Narrative: A DC87 landing roll out on Runway 28R was told to turn left at Taxiway Romeo and hold short of Runway 28L. Cleared an A320 for takeoff on Runway 28L; the DC87 continued west of Runway 28L in front of the A320. The A320 aborted his takeoff on his own after seeing the DC87 crossing. The DC87 [should have] read back hold short of 28L.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.