As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPLEMENTARY INFORMATION; CHI ENGINEERING HAS INSPECTED THIS ARTICLE AND CONTACTED THE OIL MANUFACTURER (EASTMAN OIL) TO EVALUATE THE LUBRICATION PROPERTIES. NO SUSPECT CAUSES WERE IDENTIFIED. THE CONCLUSION BY ALL CONCERNED PARTIES WAS THAT THIS WAS AN ANOMALOUS EVENT