The time-limited dispatch (TLD) analysis of the full authority digital control (FADEC) system is an important part of type certification of aero-engine. In order to make up for the existing TLD simulation analysis without taking into account the effect of the repair policy on TLD

and the short time as a variable

a TLD simulation analysis with multiple faults for FADEC system under full repair policy was proposed. The existing maintenance policies for FADEC system were compared

and according to the principle of opportunity maintenance or group maintenance

the full repair policy was presented. On the basis of the full repair policy

the analysis of simulation modeling was carried out

and the simulation process and method were designed and studied. The applicability and rationality of the proposed simulation analysis were verified through specific FADEC system. Results showed that the proposed simulation analysis was not affected by the number of parts in FADEC system

and in relation to single fault Markov model

the combined faults accounting for 8.84% of the total faults were analyzed

helping to improve the analysis accuracy.