Microlighters

Recently 3 x 582 engines lost the needle roller big end bearing, pilot side. All in the Cape. 2x Blue and 1x silver. Resulting in damage through out the engine. Is this a weak point and any others out there?

Some of the pilots in the Cape does not put Filter Oil on their filters, because then it gets dirty.

and some fly more than 400 hours without replacing the crank

As far as I know the cranck needs to be checked at 300 hours, if the run-out is within limits then it can go to 600 hours. I know of 2-strokes with over 1000 hours on the same cranck. It all depends on how one looks after it .
Jean.

Or if one looks after the air cleaners well enough. A friend of mine did well over 1000 hrs in a Thunderbird. Same crank.