Study On Airworthiness Standards For Takeoff And Landing Performance And Flight Operations Of Large Aircraft On Contaminated Runway

In recent years,due to the increase of aircraft overrun runway accidents caused by contaminated runway,the problem of safe operation on contaminated runway has become increasingly prominent.In the face of the development of China civilaviation,and domestic large-scale aircraft projects has also put forward new standards and requirements for the airworthiness certification capability of take-off and landing performance of contaminated runway.Based on the reference of foreign related airworthiness regulations and guiding materials,this paper takes largeaircraft as the research object,and conducts research and analysis on the airworthiness standard ofthe flight performance and flight operation on contaminated runway.Firstly,the air traffic regulations and guiding documents of contaminated runways at home and abroad were studied.The airworthiness regulations related to the calculation methods of runway pollutant resistance,the takeoff and landing performance of contaminated runway,and flight operations were compared and analyzed.The takeoff and landing accidents were collated and analyzed,and the main types of pollutants causing the accidents and the causes of the accidents were summarized,which provided theoretical background support for the study of airworthiness standards of takeoff and landing performance of contaminated runway and flight operational.Secondly,based on the calculation method of runway pollutant resistance at home and abroad,the force analysis of the contact surfaces of tire-liquid pollutants and tire-solid pollutants was carried out,and the calculation of resistance of liquid pollutants and solid pollutants was established.Based on the model,the case analysis is given.On the basis of this,the take-off process and landing process of the contaminated runway are studied.Combined with the analysis of the take-off and landing motion,the calculation method of takeoff and landing performance of contaminated runway is established.Finally,combined with the previous research results,AC-121-22 flight crew standard operating procedures and FCOM,recommendations were made for takeoff procedures and landing procedures of contaminated runway.