You upgrade, but you don't necessarily have to buy a whole new machine where everything that you had before no longer works, like buying a new console.

On opening the cases we found that 25 sets of video-recorders had been damaged by sea-water, and seem to be a complete write-off.

Cracks on engine bodies, no matter main engine or auxiliary one, are very dangerous defects, extension of which will lead to the engine discarded or serious accident.