As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FROM DFW TO CAE, CREW REPORTED STAB/MAC TRIM FAILURE MESSAGE LIGHTS ILLUMINATED. AIRCRAFT RETURNED TO DFW, DECLARED AN EMERGENCY, AND LANDED SAFELY. MAINTENANCE PERFORMED GROUND TEST OF HSTCU. NO FAULTS WERE NOTED. MAINTENANCE CLEANED STAB TRIM SWITCHES. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)