As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB TRIM & MACH TRIM CAUTION MESSAGE. STAB TRIM WAS STUCK, TRIED BOTH STAB 1& 2 INDEPENDENTLY. STAB TRIM ENGAGED ON THE GND. FLT 5519 MDC FAULTS HAD BITS SET FOR FAILED FLIGHT OFFICER’S PITCH DISCONNECT SWITCH & CAPTAIN`S TRIM SWITCH. CLEANED LUBED CAPTAIN'S TRIM SWITCH AS REQUIRED. REPLACED FLIGHT OFFICER'S PITCH DISCONNECT SWITCH. OPERATIONS CHECKED GOOD.