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 LAVATORY INOPERATIVE; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT TPA. REMOVED OBSTRUCTION FROM LAVATORY LINE (CLOG) AND INSTALLED NEW VACUUM GEN BLOWER AND REINSTALLED ACCESS PANEL. PER AMM 38-32-05 AND PER AMM 38-32-00.