As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEN MINUTES AFTER TAKEOFF, PILOT NOTICED ELECTRICAL POWER SURGES AND WHILE TRYING TO ISOLATE PROBLEM, LOST ALL ELECTRICAL POWER. INSPECTION FOUND RIGHT START RELAY HAD STUCK AND DESTROYED RIGHT STARTER AND CAUSED BATTERY MASTER RELAY TO FAIL. INSTALLING STARTER ENGAGED LIGHTS TO START RELAYS. THIS WILL ADVISE PILOT OF STUCK RELAY BEFORE TAKEOFF.