The research on conformity method of airworthiness requirement of fresh air for civil aircraft

The external environment encountered by civil aircraft in flight is changing dramatically, so it needs install air conditioning system to provide the sufficient amount of fresh air to cockpit and cabin for ensuring a safety and comfort environment for occupants. This paper analyses the airworthiness requirement of fresh air for cockpit and cabin of civil aircraft, including three scenarios of normal condition, probable failure condition and shutoff condition of air conditioning system, puts forward the corresponding conformity analysis, calculation and test verification method, and gives the analysis results with typical aircraft for reference.