As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/CLE - FLT 6552 - DURING TAKEOFF AT 2200 HRS ON 4-21-96, ABORTED THE TAKEOFF DUE TO THE LEFT BETA LIGHT ILLUMINATING. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE BETA PRESSURE SWITCH. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)