Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2020-01-01Original Date: 2020-01-01Title: Section § 27.831 - Ventilation.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT. Subpart D - Design and Construction. - Personnel and Cargo Accommodations.
Code of Federal Regulations / Title 14 - Aeronautics and Space / Vol. 1 / 2020-01-01524
§ 27.831 Ventilation. (a) The ventilating system for the pilot and passenger compartments must be designed to prevent the presence of excessive quantities of fuel fumes and carbon monoxide. (b) The concentration of carbon monoxide may not exceed one part in 20,000 parts of air during forward flight or hovering in still air. If the concentration exceeds this value under other conditions, there must be suitable operating restrictions.