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 FIELD AFTER THE CREW RECEIVED A FLAP DRIVE CAUTION DURING CLIMB. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE FLAP POWER UNIT. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.