As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT EXPERIENCED NR 1 GENERATOR DROP OFF LINE AT NIGHT WITH HEATS ON. UNABLE TO RESET. APPROXIMATELY 30 MINUTES LATER, NR 2 GENERATOR DROPPED OFF LINE. UNABLE TO RESET. DIVERTED TO VFR AIRPORT AND LANDED. FOUND NR 2 GENERATOR BRUSHES WORN PAST LIMITS AND THEY SHOWED SIGNS OF HEAT DAMAGE TO BRUSH LEADS. NR 1 GENERATOR BRUSHES WORN TO LIMITS, BUT WAS ABLE TO RESET ON GROUND AND IT DID WORK.