After over hauling of an attached lo pump of aux . engine 4th engineer failed to fit the washer with the plug . A/E while running on load in parallel, due to vibration the plug gave away and the lube oil drained totally from the system. The LO low pressure cut out did not activate the trip due to loss of air supply, the engine crank shaft seized with the bearing and came to stand still.

The lesson learnt from the incident is that care to be taken while overhauling / repair.
The crankshaft had to be changed with new bearings after required machining.
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