As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, AT 16,000 FEET, ALL LAVATORIES STILL INOPERATIVE. SUCTION FEED FOR FLUSH DID NOT WORK AS PROMISED. THE FLIGHT DECLARED AN EMER & RETURNED TO FIELD WITHOUT FURTHER INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. FOUND SYS CB PULLED FOR NEF SYS, NOT VAC PUMP CB. RESET SYS CB & COLLARED VAC CB. ACFT OK FOR SERVICE IAW NEF 38-30A.