As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE TAXI/RUN THE AIRCRAFT VEERED RIGHT INTO A DITCH ON TAXIWAY ZULU. THE CAUSE IS UNKNOWN AT THIS TIME. IAD FIRE DEPARTMENT AND LAW ENFORCEMENT PERSONNEL WAS DISPATCHED TO ASSIST. THERE IS NO FIRE OR INJURIES REPORTED. THE FULL EXTENT OF THE DAMAGE IS UNKNOWN AT THIS POINT. CORRECTIVE ACTION: STILL INSPECTING.