just read the report again. this was a top end overhaul, pistons rods and rod bearings. report says it was a main bearing failure which caused the adjacent rod bearing to fail. this does not make sense to me?
maybe i missed something but you would have to raise the engine up to remove the main bearings.it is quite unusual to have a main bearing failure but quite common to have a rod bearing failure and the crank journal machined with oversized bearing added. a top end overhaul is pistons and heads and typically doesn’t include the main bearings.
in another paragraph it says that the main bearings were removed and examined.
there is a lot of double talk here not surprising if you have ever worked up in Seattle.
it appears that the NTSB was Bambozzled