As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFER TO AFDL 288324 ITEM 2, MACH TRIM, STAB TRIM, AUTO PILOT PITCH TRIM FAIL CAUTION MESSAGE ILLUMINATED IN FLIGHT WOULD NOT RESET UNTIL 3RD ATTEMPT, FLT 4375 CX. REFER TO MAINT ENTRY #288324-3 FOR CORRECTIVE ACTION. AN EMERGENCY WAS DECLARED.