As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT ON PREFLIGHT INSPECTION THE OIL COOLER FAN IMPELLOR WOULD NOT TURN BY HAND. BEARINGS WERE SEIZED. INSTALLED SERVICEABLE BLOWER ASSY. THIS PART IS FAILURE PRONE, SUSPECT ALTERNATIVE ARMATURE BEARINGS OR GREASE BE CONSIDERED. (K)