As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT OVERWEIGHT. DURING CLIMB ALL BUT THREE LAVATORIES BECAME INOPERATIVE. CLEARED BLOCKAGE IN DRAIN LINE AFT OF LAVATORY 2L - 1L. PERFORMED OPERATIONAL CHECK IAW AMM 38-32-00-160-802. SYS CHECKED NORMAL.