As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST GETTING READY TO START APPROACH FOR CHA AT ABOUT 3000 FT. SET FLAPS TO 8 DEGREES AND GOT A FLAP FAIL CAUTION MESSAGE. CREW BROKE OFF APPROACH, RAN QRH, THEN MADE DECISION TO DIVERT TO TYS DUE TO RUNWAY LENGTH AND A WET RUNWAY. LANDED TYS WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FLAP ELECTRONIC CONTROL UNIT WITH NO FURTHER FAULTS NOTED.