As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ALTERNATOR COOLING FAN FAILED. FAN APPEARS TO HAVE LOST FIT BETWEEN SHAFT SHOULDER AND PULLEY. FAN BECAME OFF-CENTER AND BROKE THROUGH/SEPARATED SHAFT. FOUND FAN SEPARATED FROM ALTERNATOR AND LODGED BETWEEN ALTERNATOR BRACKET AND STARTER RING GEAR.