As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - AIRCRAFT ABORTED TAKEOFF WHEN THE TAKEOFF WARNING HORN SOUNDED. THE FLAP LEVER WAS SET AT 5 DEGREES AND THE INDICATOR SHOWED 0 DEGREES. CREW PULLED AND RESET THE FLAP INDICATOR CIRCUIT BREAKERS AS DIRECTED BY MAINTENANCE CONTROL AND IAW QX GMM 4-1-0, PAGE 7. THE FLAP INDICATION AND OPERATION RETURNED TO NORMAL. AIRCRAFT OK FOR SERVICE.