As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6553 - BOS-EWR - AIRCRAFT ABORTED TAKEOFF DUE TO LEFT ENGINE RED BETA WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED BETA PRESSURE SWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)