As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN PITCH TRIM INOPERATIVE EICAS MESSAGE DURING CRUISE FLIGHT WITH OUT SELECTING A CHANGE OF TRIM AND A/P ON FO'S SIDE. T/S IN REF TO FIM TASK 27 43 00 STEPS 1-4/10-11. FOUND CONTINUITY DEFECT ON PUSH BUTTON MAIN CUTOUT. R & R THE PUSH BUTTON IAW AMM 20 13 04. OPS CHECK GOOD. R & R IC 600 DUE TO AUTO PILOT COMM TO TRIM SYSTEM ISSUE IAW AMM 31 42 01. OPS CHECK GOOD. OK FOR SERVICE