Where must the breather line not discharge?

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

What must be prevented regarding oil emitted from the breather?

The breather discharge must not cause emitted oil to strike the pilot's windshield.

The breather discharge must not constitute a fire hazard if foaming occurs.

Breather lines must be arranged so that condensed water vapour that might freeze and obstruct the line cannot accumulate at any point.

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ED Decision 2003/16/RM

(a) Each oil line must meet the requirements of CS 29.993.

(b) Breather lines must be arranged so that –

(1) Condensed water vapour that might freeze and obstruct the line cannot accumulate at any point;

(2) The breather discharge will not constitute a fire hazard if foaming occurs, or cause emitted oil to strike the pilot’s windshield; and

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

Source-Title: CS 29.1017 Oil lines and fittings View latest amendments

Erulesid: ERULES-1963177438-5451 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 14 November, 2003

Entryintoforcedate: 14 November, 2003

Regulatorysource: ED Decision 2003/16/RM Navigate

Regulatorysubject: CS-29

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR