As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS LT & RT ENG GEN CONTROL OFF LIGHTS CAME ON IN FLIGHT. AFTER CHECKLIST CARRIED OUT EVERYTHING WENT BACK TO NORMAL. ON ARRIVAL NO EXISTING FAULTS SHOWING ON MAT. CREW RAN LT & RT ENGS ON GND, WHEN ENG AT IDLE EXT POWER & APU POWER REMOVED. VERIFIED LT GEN PROVIDES POWER TO LT MAIN BUS & RT GEN PROVIDES POWER TO RT MAIN BUS, NIL EXISTING FAULTS. ACFT OK FOR SERVICE.