As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED A MINOR WEEP AND TICKING NOISE FROM HYDRAULIC PUMP. WHEN HELICOPTER SHUT DOWN THE RETURN LINE FILTER BYPASS TELL-TAIL WAS POPPED. IT WAS RESET AND AIRCRAFT STARTED, RAN AGAIN WITH SAME RESULT. BRASS FOUND IN HYDRAULIC FLUID ORIGINATING FROM PUMP.