As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) PILOT EXPERIENCED COMPLETE LOSS OF ELECTRICAL POWER WHEN THE UNDERCARRIAGE WAS RETRACTED AFTER TAKE-OFF. INVESTIGATION FOUND THE BUS 1 AND 2 CURRENT LIMITERS BLOWN. FURTHER INVESTIGATION FOUND THE ALTERNATOR BLOCKING DIODE HAD AN UNSERVICEABLEINSULATOR THAT WAS SHORTING ALTERNATOR OUTPUTS TO EARTH.