As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED A FLAPS FAIL CAUTION MESSAGE UPON ARRIVAL AT SLC. COULD NOT RAISE FLAPS FROM THE 45 DEGREE POSITION. REMOVED AND REPLACED RT BPSU IAW MM 27-51-10. RIGGED RT BPSU IAW CRJ MM 27-51-10 AND REINSTALLED FLEX DRIVE AND SAFETIED IAW CRJ MM 27-54-00. OPS CHECK GOOD.