As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, T/O WARNING HORN SOUNDED AT APPROXIMATELY 50 KNOTS AND THE TAKEOFF WAS ABORTED. CREW CYCLED FLAPS FROM 0 DEG TO 35 DEG, THEN BACK TO 5 DEG AND SYSTEM OPERATED NORMALLY. MAINTENANCE CHANGED THE FLAP POSITION INDICATOR AND SYSTEM OPS CHECKED GOOD IAW PIEDMONT PROCEDURES. AIRCRAFT WAS THEN RELEASED FOR SERVICE.