As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED LOSS OF BOTH STABILIZER TRIM CHANNELS AND MACH TRIM AFTER TAKEOFF. THE AIRCRAFT RETURNED TO THE AIRPORT AND LANDED NORMALLY. THE PASSENGERS DEPLANED NORMALLY. THE CAPTAINS STABILIZER TRIM DISCONNECT SWITCH WAS REPLACED AND CHECKED OUT GOOD. AIRCRAFT RETURNED TO SERVICE.