As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WITH GPU CONNECTED TO AIRCRAFT ON RAMP AND BATTERY MASTER/AUXILIARY BATTERY/MAIN BATTERY SWITCHES ON. ELECTRICAL BURNING SMELL AND SMOKE NOTED COMING FROM BETWEEN TOILET PANEL AND SEAT 1D OVERHEAD STOWAGE. SERVICE BULLETIN A8-33-39, DATED 15 AUGUST 1997 RELEASED TO MPROVE CONNECTOR POWER CAPABILITIES.