This paper investigates the feasibility of MA600 reduced-power take-off by finding the necessary conditions which reduced-power take-off must satisfy based on the performance characteristics and actual flight data of MA600 turboprop aircraft. Finally, we come to the conclusion that reduced-power take-off of MA600 aircraft can be achieved.
The basic faults detection logic of fuel flow metering valve can not detect all the faults. It may cause un-commanded in-flight shut-down (IFSD) on the aero-engine and threat the flight safety. The operation principle of fuel flow metering valve is introduced in this paper. The basic faults detection logic is given. Two IFSD examples are presented. To reduce the un-commanded IFSD, faults detection logic updating is discussed. It can be used to design the new control software of the aero-engine and improve the aero-engine’s reliability.
Constant stress accelerated life test is one of the best effective methods which can verify the reliability of products with high reliability and long lifetime index, and how to evaluate the reliability of products exactly with the accelerated test data under periodic inspection is concerned especially in the engineering. An integral estimation method for the grouped data of the constant stress accelerated life test is presented in this paper, the method can make the grouped data from different stress levels an integral for statistical analysis, and it can reach higher precision than the traditional method.
The high pressure turbine clearance control valve (HPTACCV) fuel leakage on CFM56-5B engine can cause some flight delays and cancellations. The basic structure of HPTACCV is introduced. The root cause of the fuel leakage is given. In the field, to provide a more reliable engine, Weibull Analysis can be used to determine the soft time. This paper presents how to use Weibull Distribution to calculate the soft time life and forecast the spare parts equipments. This method can be used to evaluate the other failures of the aero engine components.
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