What was found
STAB TRIM AND MACH TRIM CAUTION MESSAGES WILL NOT RESET. REPLACED FO'S STAB TRIM SWITCH IAW MM 27-41-05. OPERATIONAL CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
STAB TRIM AND MACH TRIM CAUTION MESSAGES WILL NOT RESET. REPLACED FO'S STAB TRIM SWITCH IAW MM 27-41-05. OPERATIONAL CHECK GOOD.