It has been over 2 years since the initiative of civilian contractor maintenance on military aircrafts system. That includes patterns of civilian maintenance on air fleets, airplane and systems. Although this system has already covered most of tri-services military aircrafts, the actual efficiency is yet calculable. This paper focuses on the Army TH-67 helicopter case, the most comprehensive case under this system, with adoption of quantized methodology. The research begins with interviews of policy, planning and execution level personal of Ministry of National Defense and Army general headquarters as well as the contractor personal from system, Planning, Management and Execution level with focus of customer satisfaction perspectives, a detailed interview outlines based on the result of this phase is then developed. After inducing and analyzing the interview results combined with relative files, document and records three main subjects were proposed as foundation of connection between civilian contractor maintenance system and customer satisfaction. After obtaining the analysis result of interview and data, the Army TH-67 helicopter battalion implemented the system and discovered the customer satisfaction indices on reliability, timing, convenience, and efficiency are significantly improved compared to what used to be. Therefore, the implementation of civilian contractor maintenance system definitely has positive effect to customer satisfaction. To the Armed forces of R.O.C a clear and stable guidance on military aircrafts maintenance outsourcing system indeed plays a crucial role to customer satisfaction.