As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANC - DURING MAINTENANCE CHECK, NOTICED SMOKE AND ELECTRICAL BURNING SMELL IN AFT CABIN. FOUND WIRING FOR POTABLE WATER HEATER JUST ABOVE TANK OVERHEATED. REINSTALLED HEAT TAPES PER EO 1-38-10-01E AND CONNECTED HEAT TAPE WIRING TO AIRCRAFT PER EO 1-38-10-01 FIGURE 1. (M)