As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED A LOUD METALLIC GRINDING SOUND FROM BELOW THE RIGHT SIDE AFT GALLEY FLOOR, FOLLOWED BY THE ODOR OF ELECTRICAL SMOKE. MAINTENANCE FOUND SOURCE OF ODOR TO BE THE LAVATORY VACUUM GENERATOR (37MG). REPLACED VACUUM GENERATOR IAW AMM 38-31-64. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK. AIRCRAFT WAS GROUNDED.