As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH ELECTRICAL SYSTEMS FAILED IN-FLIGHT. RIGHT ALTERNATOR FAILED IN-FLIGHT. LEFT ALTERNATOR INOP LIGHT WAS NOT ILLUMINATED DUE TO A BROKEN WIRE ON THE LIGHT CONCEALING A FAILED LEFT ALTERNATOR. SUBMITTER RECOMMENDATION: ADD INSPECTION OF ALTERNATOR INOP INDICATORS TO NORMAL INSPECTION PROGRAM.