When we broke down the 100 most recent P210 accidents, 24 engine/mechanical events topped the list-a rate consistent with other big-bore singles. Of the engine failures, a third were due to improper maintenance, including everything from the wrong bolt torque to use of non-aviation hoses for the turbocharger oil supply and return lines. In that case, the hoses developed numerous leaks, spraying oil throughout the engine room, leading to an inflight fire.
Twenty-one pilots experienced the big silence up front after mismanaging fuel in some fashion. Ten pilots of P210Ns (left/right fuel system) ran one tank dry and either didn’t bother to try to switch tanks to get a restart or were too low to have time before reaching the ground. That’s consistent with accident data that shows the fewest fuel-related accidents are in aircraft with an on/off system or one that can feed both tanks at once.