As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING BOARDING, THE MID LAV DOOR SWITCH SHORTED CAUSING SMOKE TO BE OBSERVED DURING BOARDING. CAPPED AND STOWED WIRES PER ER/A 551323-14. REMOVED AND REPLACED THE MID LAV DOOR SWITCH PER SWP MANUAL 20-30 (REFERENCE: LOGPAGE 8673683). (2016-00596).