As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT EXPERIENCED AN INFLIGHT ENG FAILURE AT 1250 FT AGL. AIRCRAFT AUTO ROTATED TO GROUND WITH NO DAMAGE SUSTAINED. POST LANDING INSPECTION REVEALED THAT THE DUAL MAG/SIGLE DRIVE SET-UP HAD A STRIPPED PHENOLIC GEAR. THE DRIVE GEAR IS METAL AND STRIPPED MOST OF THE TEETH OFF THE PHENOLIC DRIVEN GEAR. THE MANUAL STATES THAT THE PHENOLIC GEAR SHOULD BE SOAKED IN OIL PRIOR TO INSTALLATION. THE GEAR APPEARED DRY, O/H.