On January 4, 1990, at 8:15 EST, the aircraft took off from Miami. At 9:10 , the pilots heard a loud bang. The pilots did not know that an engine fell off the aircraft.[2] The aircraft flew for 50 minutes before emergency landing at Tampa International Airport.[3]
After looking, it was found that the lavatoryseal was missing. This made lavatory fluid freeze, and fall into the third engine. The engine fell off after being damaged. The engine was designed this way.[1][4]