As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6292 - IAD-DAY - AIRCRAFT ABORTED TAKEOFF DUE TO LEFT BETA LIGHT ILLUMINATED ON TAKEOFF. AIRCRAFT RETURNED TO GATE. MAINTENANCE REMOVED AND REPLACED LEFT BETA SWITCH. OPS CHECKED GOOD. AIRCRAFT WAS THEN APPROVED FOR RETURN TO SERVICE. (Z)