Primary finding
Probable cause
The local and ground controllers' failure to adequately coordinate the movement of the two airplanes, the tower cab supervisor's failure to provide adequate supervision to the controllers, the MD-11 flightcrew's misinterpretation of the local controller's question about whether they could make a right turn onto another taxiway as a clearance, and the MD-11 flightcrew's failure to ensure that their aircraft could clear the B-747.