was entered into the aircraft transponder. The number three engine was shutdown due to heavy vibration and loss of normal indications. The second officer left the cockpit to inspect the cabin area, and reported that a large portion of the forward right side of the cabin fuselage was missing. The captain subsequently shutdown the number four engine due to flashes of fire. The crew initiated fuel dumping procedures during descent to reduce the landing weight.
             During the descent to landing the flight attendants had approximately twenty minutes to prepare the passengers for an ocean ditch, impact and emergency evacuation. During these twenty minutes, they had attended to injured flight attendants, and passengers. They attached emergency masks to portable oxygen bottles, helped each other don their life preservers, helped numerous passengers don their life preservers, and briefed "helpers" on evacuation procedures.
             Flight 811 was cleared for an approach into HNL runway 8L. The final approach was flown at 190 to 200 knots indicated airspeed with only the number 1 and 2 engines operational. During flap extension, the crew noticed an indication of asymmetrical flaps
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