As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1795 FLL-CUN - SPORADIC AFT LAV OPERATION WITH NO PERSON IN THE LAVATORY COMBINING WITH ODOR OF MELTING PLASTIC AND STRONG ELECTRICAL. ACCOMPLISHED TSM 25-30-00-801A.IDENTIFIED THE AFT LAVATORY VACUUM GENERATOR RUNNING CONTINUOUSLY, DEACTIVATED AFT VACUUM GENERATOR PER MEL 38-32-09 CONDITION 3. COULD NOT DUPLICATE WRITE UP, WASTE SYS VAC GENERATOR + LAV/WASTE SYS OPS NORMAL OPERATED SYS MULTIPLE TIMES OK FOR SERVICE REF MM 38-32-09 NOTED CLOSED C/B ON LICC FOR VAC BLOWER.