As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE CHIP LIGHT ILLUMINATED, PILOT TURNED TO LAND AT NEAREST PLATFORM. ON APPROACH TO PLATFORM ENGINE STARTED MAKING A LOUD WHINING NOISE FOLLOWED BY LOUD POPPING NOISE AND AIRCRAFT YAWED. AUTO-ROTATED, DEPLOYED FLOATS AND LANDED IN WATER.