As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE COMING FROM WIRES IN THE LAVATORY SERVICE PANEL. ELECTRICAL SMOKE ODOR. WASTE SYSTEM CIRCUIT BREAKER TRIPPED. FOUND FLUID LEVEL LIGHT BULB BURNED OUT WHICH WAS THE CAUSE OF THE SMOKE IN THE AREA. RESET THE CIRCUIT BREAKER CB2-M9. REMOVED AND REPLACED THE LAVATORY SERVICE LIGHT IAW ESPM 20-17-00. OPS CHECKED GOOD.