As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A PROGRESSIVE INSPECTION PROGRAM, PHASE 2 INSPECTION DISCOVERED ALTERNATOR NR 2 COOLING FAN LOOSE ON ALTERNATOR SHAFT. FAN PN: ES4137 IS PART OF ALTERNATOR PN: 653344. THE KEY WAY OF THE FAN HUB WEARS PREMATURELY ALLOWING ROTATIONAL MOVEMENT OF THE FAN ON THE SHAFT.