A4A Specification 126, Recommended Practices for Addressing Cabin Air Quality Events, is an electronic industry guidance document for airline operators and aviation personnel. It covers the recognition and classification of cabin odors and fumes, recommended flight deck and cabin crew responses, mitigation procedures, maintenance logbook and standardized reporting practices, and training considerations.
The document includes guidance for environmental control system, cabin-sourced, cargo-released, and externally sourced odors and fumes, along with severity levels, response recommendations, a cabin air quality event reporting form, and training topics for crewmembers, maintenance personnel, and management. It also includes related licensing terms and references to FAA SAFO 18003 and ICAO Circular 344-AN/202.
Application Scope: Intended for airline operators, flight and cabin crews, maintenance organizations, safety managers, training departments, and other aviation professionals developing procedures for cabin air quality events not suspected to involve fire.
