Study of uncontained turbine engine rotor failure airworthiness compliance verification method

The safety design is very important to civil aircraft. In order to verify the civil aircraft design whether meet the requirement of airworthiness regulation about the hazards to an airplane in the event of uncontained turbine engine rotor failure, which require the design measures to minimize the hazards in the case of uncontained turbine engine rotor failure. Airworthiness compliance verification method is presented in this paper. Firstly, in the cause of uncontained rotor fragments bursting out, the hazards validation method is proposed based on the results of airplane level functional hazard analysis (FHA) and fault tree analysis (FTA) in this paper. Secondly, airworthiness compliance verification procedure is developed. Thirdly, quantitative assessment model of hazards caused is proposed and calculated. Finally, an example show the whole airworthiness compliance verification procedure include hazards validation, quantitative calculation and airworthiness compliance verdict Results show that the hazard combinations resulting in multiple systems failure can be identified, thus providing more sufficient basis for airplane design improvement to minimize the hazards caused by uncontained engine rotor failure. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Airworthiness Technologies Research Center NLAA, and Beijing Key Laboratory on Safety of Integrated Aircraft and Propulsion Systems, China