Engine breather lines.

CFR · 2024-01-01 · US · Title 14

(a) Engine breather lines must be so arranged that condensed water vapor that may freeze and obstruct the line cannot accumulate at any point. (b) Engine breathers must discharge in a location that does not constitute a fire hazard in case foaming occurs and (c) Engine breathers may not discharge into the engine air induction system.

official document · source cfr-2024 · id 14:§ 121.243