As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL LAVS OUT OF SERVICE. FOUND LAV D GATE VALVE STUCK OPEN, DEPLETING VACUUM FROM OTHER TOILETS. AFTER MANUALLY CLOSING LAV D GATE VALVE ALL OTHER TOILETS OPS NORMAL ON GROUND. REF LOG PG 6790548 FOR WORK ACCOMPLISHED. OPS CHECK GOOD. NO LEAKS NOTED. NO FURTHER DEFECTS. ALL LAVS OPS. REMOVED AND REPLACED LT LAV D TOILET IAW AMM 38-32-01. OPS CHECKED GOOD NO LEAKS NOTED. NO FURTHER DEFECTS NOTED. ALL LAVS FLUSH PROPERLY.