Skymaster Arctic Circle Ditching.

[billsheila]

So is all that is required to have some insulation over the line to prevent this problem?

[Skymaster337B]

The oil breather line should have a knoch cut into it about an inch or two above the end to counter a frozen line. If the engines were recently overhauled perhaps the shop replaced that line but didn't read the maintenance manual about ensuring that knock was there. That knoch is why most Skymaster belly's are dirty. It's a necessary evil.

[WebMaster]

What about the rear engine??
My memory is that the rear vapor line goes up and out the rear of the cowling, adjacent to the prop. Would that line also get frozen up??