As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT GATE SRQ APU GEN FELL OFF LINE, RESETS NO HELP, NO VOLTS OR FREQ. FOUND GEN FEED WIRE 3X4D2N LOOSE AND BURNED ALSO GEN. TERMINAL BURNED OFF. RMVD APU & GEN. INST. APU GEN. PER M/M 24-20. RE-INST APU PER M/M 49-10 APU LK CKS & OPS CKS. (LP0761874)