| For civil airplane, the good or the bad of its maintainability will directly affects its whole life costs and affects its competition in the market. So the maintainability of airplane must be considered at the early stage of design.This paper firstly put forward maintainability qualitative parameters being the same with civil airplane based on traversing maintainability qualitative parameters of warplane. This paper validate the good or the bad of reachability from three point of view: firstly, putting forward reachable time and giving method that resolve the reachable time, the reachable time validate qualitative parameters with quantitative data. Secondly, validating the good or the bad of reachability from view reachability, putting forward validation method of view reachability: validation method of relatively position and validation method of field of view and giving compute aided validation flow; thirdly, validating the good or bad of rachability from space reachability, researching compute aided validation rule and contents and flow of task space. Lastly, taking the group of wheel of the main undercarriage for example, illuminating compute aided validation method.Validation method of civil airplane maintainability qualitative parameters is instructive to constitute successfully a computer system of maintainability evaluation and validation of airplane. |