What was found
WHILE DESCENDING TO IAH ALL THE SUDDEN WE STARTED FEELING VIBRATION AND LOUD HUMMING SOUND WHAT SOUND LIKE A LOOSE LAV CAP. UPON INSPECTION AFTER LANDING, LAV CAP IS INTACT BUT THE RIGHT SIDE FLAP SEAL IS BEING PUSHED DOWN BY RIGHT INBOARD FLAP. CORRECTIVE ACTION; FOUND LEFT AND RIGHT INBOARD FLAP SEALS HANGING DOWN AND NOT FLUSH TO FLAPS. REMOVED AND REPLACED LEFT AND RIGHT INBOARD FLAP SHROUD PANELS IAW EMB300 MM 57-54-00.