As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN A HOVER, DURING A TRACK AND BALANCE FLIGHT THE NR 1 HYD SYSTEM FAILED. INDICATED BY A MASTER CAUTION LIGHT AND LOSS OF NR 1 SYSTEM HYD PSI AND THE PEDALS GOT STIFF. PERFORMED LANDING AND CHECKED HYD PSI AND SHUT THE NR 1 SYSTEM OFF IAW THE EMERGENCY CHECK LIST, AND SHUT THE ACFT DOWN. HYDRAULIC LINE FAILED.