As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, T/O WARNING HORN SOUNDED. CREW ABORTED TAKEOFF. FLAPS WERE CYCLED AND HORN DID NOT SOUND. MAINTENANCE FOUND CONDITION LEVER MICRO SWITCH 3151-S3 TO HAVE A DETERIORATED SOLDER JOINT AT THE SWITCH. SWITCH WAS RESOLDERED AND SYSTEM CHECKED IAW PIEDMONT WORK CARD PROCEDURES. OPS CHECKS WERE GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.