As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUAL BUS CAUTION LIGHTS AFTER GEAR RETRACTION. PERFORMED DC BUSSING OPERATION CHECKS ON BATTERY & EXTERNAL POWER. CHECKED GENERATOR PARALLEL. PERFORMED OPERATION CHECK OF AUTO PILOT ON THE GROUND AND IN AIR. COULD NOT DUPLICATE DISCREPANCY.