§ 25.1017 - Oil lines and fittings.

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Each oil line must meet the requirements of § 25.993 and each oil line and fitting in any designated fire zone must meet the requirements of § 25.1183.

Breather lines must be arranged so that—

Condensed water vapor that might freeze and obstruct the line cannot accumulate at any point;

The breather discharge does not constitute a fire hazard if foaming occurs or causes emitted oil to strike the pilot's windshield; and

The breather does not discharge into the engine air induction system.