Originally Posted by
eggplantwalking
Complete loss of oil would not be a problem due to a broken line or an engine problem as the oil tank has a stand pipe of a few gallons of oil which is only available to the feather motor for feathering. All aircraft with the big round engines have this safety feature incorporated into the design and we regiously check the feathering system before every flight.
Years ago I had an R-1820 failure of the oil line that sends the oil to prop dome to adjust the propeller pitch. There was something called a b-nut that cracked as I recall. The oil was being pumped out onto the hot cylinders and you could see the smoke. We had a potentially unfeatherable engine that was about to seize but we got it shut down in time and went back to home plate.