As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5450 - AT LEVEL OFF FROM CLIMB AT 260 KTS, HIGH SPEED CLACKER SOUNDED FOLLOWED SHORTLY BY FLAPS FAIL CAUTION MESSAGE. FLAPS WERE AT 0 DEGREES. EMERGENCY DECLARED, AIRCRAFT LANDED SAFELY IN TYS. REMOVED AND REPLACED RIGHT BPSU. ALSO COMPLIED WITH TASK CARD SI-2-27I0002, FLAPS FAIL CAUTION MESSAGE FOLLOW-UP MAINTENANCE ACTION.