As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNED WIRE ODOR IN ELECTRONIC EQUIPMENT BAY. ACFT GROUNDED. CONDUCTED GVI OF ELECTRONIC EQUIPMENT BAY. ODOR APPEARS TO BE AT P91 OR APU START CONVERTER UNIT. OPENED P91 INSPECTED WIRES & CIRCUIT BREAKERS & RELAYS, FOUND NO DEFECTS. OPENED FLOOR PANEL TO INSPECT J9 & J39 PANELS, FOUND NO DEFECTS. STARTED APU, ODOR WAS STRONGER AT APU START CONVERTER. R & R APU START CONVERTER IAW AMM REF 49-41-61-000-801, 49-41-61-400-801. OPS CHECKS GOOD.