As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB AND MACH TRIM CAS MESSAGE IN FLIGHT. COMPLIED WITH QRH, MESSAGE CLEARED AFTER SECOND ATTEMPT, AIR RETURN. FOUND BAD PITCH DISCONNECT SWITCH DURING TROUBLESHOOTING. REMOVED AND REPLACED PILOTS SWITCH IAW AMM 27-41-30, OPS CHECK GOOD. (M)