As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTERNATOR DRIVE COUPLING FAILED IN FLIGHT CAUSING LOSS OF ALL ELECTRICAL CHARGING CAPABILITY. FLIGHT CONTINUED TO HOME BASE WITHOUT INCIDENT. THIS IS THE SECOND FAILURE OF THIS PART. FIRST PART (NEW ENGINE) AT 271 HOURS, REPLACED WITH REBUILT PART. THIS ONE LASTED 254 HOURS.