As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THE ALTERNATOR LOADMETER WENT TO ZERO AND PILOTS WERE UNABLE TO RESTORE POWER. INSPECTION OF THE ALTERNATOR REVEALED THE SLIP RINGS INSIDE THE ALTERNATORS WERE SO WORN THAT IT BROKE THE BRUSHES; THE BRUSHES THEN FELL INTO THE ALTERNATOR, CAUSING THE FAILURE. THE NEWLY OVERHAULED ALTERNATOR HAD BEEN INSTALLED TWO DAYS PRIOR.