As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COWLING FAN STARTED TO LEAK OIL IN OPERATION. INSPECTION UPON DISSASSSEMBLY REVEALED A CRACKED CARBON SEAL. SUBMITTER SUGGESTED CAUSE OF DEFECT AS IMPROPER INSTALLATION. ASSEMBLY PROCEDURES HAVE BEEN REVIEWED TO ENSURE PROPER INSTALLATION.