In order to ensure the success rate of transport tasks to the aircraft steering turntable device, making a study of the failure time distribution of the pin tooth. Use the method of maximum likelihood estimation and correlation coefficient fitting goodness establishing a reliable failure time distribution of pin tooth, and applied to the use and maintenance of the aircraft steering turntable device. Finally, example are analyzed. The analysis results show that the proposed transmission pin gear failure time distribution function of the aircraft to a turntable device use and maintenance has certain guiding significance, it can ensure the success rate of transport tasks to the aircraft steering turntable device.