As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED YAW CSAS FAILURE EN ROUTE TO HOSPITAL. NO COCKPIT INDICATIONS, ONLY INTERMITTENT UNCOMMANDED TAIL ROTOR INPUTS. AIRCRAFT RETURNED TO BASE FOR MX. AFTER TROUBLESHOOTING YAW SYSTEM, FOUND YAW COMPUTER TO BE INOPERATIVE. REMOVED AND REPLACED COMPUTER, OPS CHECKS GOOD. (M)