StacksVerified U.S. regulatory reference

14 CFR §25.1017

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)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.
  2. (b)Breather lines must be arranged so that—
    1. (1)Condensed water vapor that might freeze and obstruct the line cannot accumulate at any point;
    2. (2)The breather discharge does not constitute a fire hazard if foaming occurs or causes emitted oil to strike the pilot's windshield; and
    3. (3)The breather does not discharge into the engine air induction system.