What was found
AIRCRAFT WAS GROUNDED: LAVS 2L,2R,4R WASTE TANK STATUS WENT TO 7/8 FULL (RED) LAV 2R FLUSHES CONTINUOUSLY AFTER THAT. LAVS 1L,3L,4L SHOW YELLOW 1/4 FULL. LAV 3-2R,3R SHOW GREEN 1/8 FULL. LAV 4R AND 3F-1R DO NOT FLUSH. MAINTENANCE REMOVED AND REPLACED 2F 1R TOILET PER AMM 38-32-01.