To make a scientific and reasonable maintenance workscope

an approach for civil aero-engine repair objective determination oriented towards the life cycle based on life limited parts was proposed. At first

a multi-objective optimization model was established to minimize shop visit times and total life limited parts cost

and maximize total objective time on wing in the life cycle. On the basis of the analysis of every optimization objective

a solution based on the step-by-step strategy was put forward. Finally

the approach for repair objective determination was validated by the actual data of a civil aero-engine from an airline. Validation results show that the proposed approach can achieve a balance between shop visit times and total life limited parts cost in the life cycle

based on a compromise coefficient and every weight of optimization objectives. The approach can provide decision support for aero-engine repair objective determination and avoid the randomness of making repair objective.