As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ALL LAVATORIES NOT FUNCTIONING AT ALL, PASSENGER WASTE BUILD UP IN TOILET POSSIBLE OVERFLOW. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT PHX. LAVATORY CONNECTOR FOUND DAMAGED. REMOVE AND REPLACED CONNECTOR PLUG D40152P. PER SWPM 20-61-28.