As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2309 - THE FLIGHT RETURNED TO THE GATE AFTER RECEIVING A FLAP POWER CAUTION LIGHT WHEN THE FLAP SELECTION WAS MADE. MAINTENANCE INSPECTED THE AIRCRAFT AND COMPLIED WITH THE FAULT ISOLATION MANUAL. OPERATIONAL CHECKS WERE PERFORMED AND WERE GOOD. NO DEFECTS WERE NOTED AND THE AIRCRAFT WAS RETURNED TO SERVICE.