Model Based Failure Assessment of Civil Aircraft Operation Phase

Since its inception, MBSA has become increasingly mature and more suitable for complex civil aircraft systems. The elements of the model were defined and the model building was sorted out on the basis of current researches and the draft ARP4761A. The equipment level/ system level/ aircraft level models were establish based on Simulink. The external lighting sub-system of a certain aircraft model was taken as an example, and a numerical analysis was conducted on the operational data of a certain fleet. The result indicated that the failure of MBSA and FTA results lies within the acceptable range. The FMEA analysis was performed, and indicated that the probability of losing landing light function meets the safety requirements, with both the optimistic value (λlow) and the pessimistic value (λhigh) of equipment failure rate.