N839TW
BOEING 727-31
GROUND PERSONNEL SERVICED FORWARD LAVATORY JUST BEFORE FLIGHT. FLIGHT ATTENDANT STATED FLUID WAS VISIBLE IN UPPER TOILET AREA OF FORWARD LAVATORY AFTER SERVICING INDICATING IT HAD BEEN OVERFILLED. ENROUTE NUMBER 3 ENGINE FAILED AND WAS SHUTDOWN. FLIGHT DIVERTED TO MIAMI. ON ARRIVAL A BLUE STREAK WAS FOUND ON THE RIGHT SIDE OF THE AIRCRAFT BEGINNING AT THE FORWARD LAVATORY SERVICE DOOR AND ENDING AT THE INLET TO NUMBER 3 ENGINE. THE FORWARD LAVATORY SERVICE DOOR WAS FOUND CLOSED AND THE FILL/RINSE LINE CAP WAS MISSING WHEN THE DOOR WAS OPENED. THE FILL/RINSE LINE CHECK VALVE WAS FOUND STUCK OPEN. WHEN A CAP WAS INSTALLED ON THE LINE NO LEAKAGE OCCURRED. THE LAVATORY DRAIN LINE DID NOT LEAK. NUMBER 3 ENGINE HAD SUSTAINED FAN DAMAGE DUE TO INGESTION OF SOFT MATTER.
THE OVERFILLING OF THE FORWARD LAVATORY DURING SERVICING AND THE FAILURE TO REPLACE THE FILL/RINSE LINE CAP AFTER SERVICING BY THE GROUND SERVICE PERSONNEL WHICH RESULTED IN THE LAVATORY VENTING FLUID THROUGH THE FILL/RINSE LINE DURING FLIGHT AND THE SUBSEQUENT ICE FORMATION AND INGESTION OF ICE INTO NUMBER THREE ENGINE.
Source: NTSB Aviation Accident Database
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