水 陆 两 栖 飞 机 涉 水 结 构 修 理 级 别 分 析 研 究

Level of repair analysis（LORA）is an important part of maintenance engineering analysis for amphibious aircraft wading structure. There are many studies mainly focusing on LORA of civil aircraft，shipboard aircraft，ve- hicles，ships and so on in the domestic and overseas，while studies on LORA of amphibious aircraft wading struc- ture are few. Based on this，the process and method of LORA for the wading structure of amphibious aircraft are studied in this paper. A three-level repair model of the wading structure is established，and the LORA process of the wading structure is proposed. An economical LORA（ELORA）model for three-level repair of wading struc- ture is established，and the cost factors to be considered for ELORA are given. The approach switch on the wad- ing cabin door of an amphibious aircraft is taken as an example to carry out ELORA. The results show that the ap- proach switch should be repaired in intermediate-level depot，which is in accordance with reality，and the ELORA model used on wading structure is feasible.