As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG BURNING PLASTIC ODOR COMING FROM AFT RIGHT LAV, WHEN LAV DOOR CLOSED AND LOCKED. PERFORMED CONDITIONAL INSPECTION IN AFT RT LAVS. VISUALLY INSPECTED LAVS M & K WHILE DOORS ARE LATCHED CLOSED, NO ODOR, NO BURNING NOTED, IAW AMM 05-51-56-940-801-C1.