As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 638 49-10 2346991 13DEC20 MDT CLOSE. WHEN PILOT TURNED ON HIS APU HE HAD SHED BUS 1 AND 2 OFF LINE FOLLOWED BY APU GEN OFF BUSS AND ELECTRICAL BURNING SMELL. FACT 13DEC20 23:10 MDT. APU LINE CONTACTOR SHOWS SIGNS OF BURN DAMAGE. R & R APU LINE CONTACTOR, REF AMM 24-34-03. RAN APU FOR 30 MIN. OPERATIONS CHECK GOOD, NO ELECTRICAL SMELLS AT THIS TIME. OK FOR SERVICE.