What was found
AIRCRAFT WAS GROUNDED: LAVATORIES WILL NOT FLUSH IN FLIGHT. FLIGHT RETURNED TO DFW LANDING SAFELY. MAINTENANCE REPLACED LAVATORY 1F-1L GREY WATER INTERFACE VALVE (AALA202306262649), AND LAVATORY 2A-1L GREY WATER INTERFACE VALVE (AALA202306266818), AND MID GALLEY GREY WATER INTERFACE VALVE (AALA202306260066) PER AMM 38-31-11. REPLACED LEFT VACUUM BLOWER MOTOR PER AMM 38-32-61 (AALA202306260783). REPLACED LAVATORY 2A-1L TOILET (AALA202306262762).