As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER A FLIGHT, DURING THE ALF CHECK, THE PILOT DISCOVERS PRESENCE OF HYDRAULIC FLUID AROUND THE LT MAIN ROTOR SERVO. AFTER CLEANING, IT IS DISCOVERED DURING A RUN-UP THAT THE FLUID COMES FROM THE INTERFACE BETWEEN THE MAIN BODY AND THE UPPER ARM, 3 ALLEN SCREW AREA. THE LEAK IS SIGNIFICANT SO THE ACFT IS GROUNDED AND THE SERVO REPLACED.