As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6531 - LGA-IAD - ABORTED TAKEOFF DUE TO RED BETA WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND RAN AIRCRAFT AND COULD NOT DUPLICATE AND NO DEFECTS NOTED. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)