As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A STAB TRIM/MACH TRIM CAUTION MESSAGE ON CLIMBOUT AT 5000 FT AND WERE UNABLE TO RESET. RETURNED TO IND. UPON ARRIVAL MAINTENANCE VERIFIED DISCREPANCY AND FOUND F/O'S DISCONNECT SWITCH JAMMED WHICH WAS VERIFIED THROUGH MDC CODE 270 BIT 14. CLEANED SWITCH AND PERFORMED SYSTEM OPERATIONAL CHECKS IAW AMM 27-41-00.