What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO ATL DUE TO THE FLIGHT CREWS REPORTING THAT AT FL 300 FIGHT ATTENDANTS NOTIFIED THE FLIGHT CREW THAT THE AFT LEFT LAVATORY WAS MAKING A LOUD SUCKING NOISE AND ALL LAVATORIES WERE INOPERTIVE AS WELL AS THE WASTE MANAGEMENT SCREEN INFORMATION WAS NOT AVAILABLE. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. **SUPPLEMENTAL REPORT FOR AALA202506061334: MAINTENANCE FOUND THAT THE LAVATORY D TOILET FLUSH VALVE WAS INTERMITTENTLY STAYING OPEN AND REPLACED THE TOILET ASSEMBLY PER AMM 38-31-41. A SATISFACTORY OPERATIONAL / LEAK CHECK WAS ACCOMPLISHED ** (CLOSED)