As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'THE INCIDENT OF HELICOPTER HAVING AN ENGINE FAILURE WAS CAUSED BY AN OIL LEAK FROM THE OIL LINE FROM THE ACCESSORY SECTION OF THE AFT OIL COOLER. THE LINE CHAFED THROUGH ON AN ADJACENT LINE.' SUBMITTER STATED THIS COULD HAVE BEEN PREVENTED BY BETTER SECURING OF THE OIL LINE WITH A CLAMP IN THIS AREA OF THE ACCESSORY SECTION.