Cabin Air Quality Educational Materials for Crewmembers and AMTs

Aircraft Cabin Air Flow

Refer to the following caption.
This simplified illustration shows typical airliner cabin air flow. After entering through the engines, some air is diverted and mixed 50/50 with cabin air cleaned by HEPA filters. The air circulates primarily from ceiling to exhaust vents in the floor. While fresh air flows in, a similar amount flows out and leaves the aircraft. During most phases of flight, the 50/50 ratio is maintained and cabin air is completely exchanged for fresh air every two to three minutes.

Section 326 of the FAA Reauthorization Act of 2018 (PDF) requires FAA to provide access to educational materials enhancing air carrier training on how to react to smoke or fumes on flights. On March 1, 2021, the FAA Flight Standards Service published an Information for Operators (InFO) (PDF) informing stakeholders of this site, recommending they consider incorporating such content and reporting procedures into crewmember and Aircraft Maintenance Technician (AMT) training. The FAA has also commissioned a multi-year research study on cabin air quality as directed by Congress. Access the resources below for information applicable to Crewmembers (Pilots and Flight Attendants) and AMTs.

Last updated: Friday, November 19, 2021