What was found
AFTER DEPARTURE, MACH TRIM AND STAB TRIM CAUTION MESSAGES APPEARED. FOLLOWED QRH PROCEDURE, MESSAGES STILL APPEARED. RETURNED TO AIRPORT. REMOVED AND REPLACED CAPTAIN TRIM DISCONNECT SWITCH. OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER DEPARTURE, MACH TRIM AND STAB TRIM CAUTION MESSAGES APPEARED. FOLLOWED QRH PROCEDURE, MESSAGES STILL APPEARED. RETURNED TO AIRPORT. REMOVED AND REPLACED CAPTAIN TRIM DISCONNECT SWITCH. OPS CHECK GOOD.