As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT WAS TAXING WHEN HE LOST TOTAL POWER TO NO. 2 BUS. INVESTIGATION FOUND THAT THE R/H GENERATOR COOLING FAN BLADES TOTALLY CRACKED OFF AND FLEW INTO THE GENERATOR WINDINGS, DESTROYING ALL WORKING CAPABLITY OF STARTER GENERATOR. THIS CAUSED A GCU FAILURE AND A NO. 2 BUS CURRENT LIMITER TO BLOW AS WELL.