As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GENERATOR INOPERATIVE AT DISPATCH. PHASE INBALANCE THEN ZERO VOLTS ON GENERATOR. *S/D* MAINTENANCE FOUND BURNT CONTACTS IN THE APU FEEDER CABLE CONNECTORS D4688P&J. CONNECTORS AND ASSOCIATED WIRING WERE REPLACED AND GENERATOR SYSTEM OPERATIONAL CHECKSNORMAL. D4688P (P/N 6F16082-501) ASSY. D4688J (P/N 6F11920-501) ASSY.