Feb 11, 1988
Incident
CHICAGO, IL
InjuriesNone
Phase of Flight-
ConditionsIMC
OperationFAR 121
Probable Cause
JUDGEMENTAL ERROR ON THE PART OF THE LOCAL CONTROLLER FOR CLEARING VEHICLES ACROSS THE ACTIVE RUNWAY TIWH INSUFFICIENT SEPARATION FROM ARRIVING AIRCRAFT, WHICH WAS FURTHER COMPROMISED BY A MECHANICAL MALFUNCTION IN THE EQUIPMENT CROSSING THE RUNWAY.
NTSB CHI88IA061