As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CO-PILOTS CONTROL YOKE GUIDE ROLLER ASSY FELL OUT AND ON INVESTIGATION WAS FOUND THAT WRONG SIZE BOLT WAS INSTALLED. FURTHER INVESTIGATION OF THE REST OF THE FLEET IT WAS FOUND THAT 2 OTHER ACFT HAD THE WRONG BOLT PN AND SIZE INSTALLED. CORRECT BOLT INSTALLED AND ACFT RETURNED TO SERVICE.