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A robust fault detection scheme is developed for networked control systems (NCSs) with limited quality of services (QoS), such as network-induced time delay, data dropout, and error sequence. An augmented Markov jump systems (MJSs) model is constructed, based on which a robust fault detection filter is designed. Such a design solved by using Ricatti inequality can guarantee that the error dynamic system is stochastic stable and the residual is sensitive to the fault. A numerical example and an aircraft application simulation study are provided to verify the effectiveness of the proposed method.