As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4251 - ON TAX FOR TAKEOFF, THE CONFIGURATION AURAL WARNING ACTIVATED WITH NO ASSOCIATED WARNING LIGHTS. AIRCRAFT RETURNED TO THE GATE. MAINTENANCE COULD NOT DUPLICATE PROBLEM. CLEANED ELECTRICAL CONNECTOR ON WEU. AIRCRAFT RETURNED TO SERVICE. (M)