What was found
STAB TRIM AND MACH TRIM CAUTION MSGS AT ALTITUDE. REPLACED F/O'S TRIM SWITCH IAW CRJ MM 27-41-30. 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 MSGS AT ALTITUDE. REPLACED F/O'S TRIM SWITCH IAW CRJ MM 27-41-30. OPERATIONAL CHECK GOOD.