As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN CRUISE FLIGHT THE C BOX OIL PRESSURE LIGHT ILLUMINATED. THE PILOT THEN LOOKED AT THE PRESSURE GAUGE AND SAW IT FLUCTUATING. THE HELICOPTER WAS LANDED WITHOUT INCIDENT. UPON GROUND RUN THE AME NOTICED OIL STREAMING FROM THE OIL COOLER.