Failures have similar features: the crankshaft breaks itself at the crankpin No. 3 at the crankpinweb
fillet. A more careful observation of the bedplate allowed finding two support steel shell haves where two half shell
bearings are based. All support steel shell halves are brazed to the bedplate by a hybrid foundry for supporting the shell bearings.
Two of those steel shells, in the bedplate middle, were found broken close to the bolts for tightening of two motor block
halves. Furthermore, under both steel shell halves, the bridges of the bedplate in aluminium alloy appeared with transversal
cracks, one crack in each bridge, and close to the side of the mentioned broken pieces, as is shown in Fig. 5.