Research on MTTR Allocation of Commercial Aircraft

Maintainability is always the key to the commercial success of commercial aircraft and directly affects the economy and market competitiveness. The target value of maintainability indexes of each system or equipment of the aircraft shall be determined by aircraft-level maintainability index allocation. MTTR is the most typical parameter that can reflect the maintainability level of aircraft. This paper introduces the weighting factor allocation method based on design characteristics and applies this method to the allocation of MTTR index of commercial aircraft.