沈阳威亚的外场服务项目以螺旋桨现场排故和螺旋桨、旋翼动平衡调试为主。 　　Field service of Shenyang Avias mainly include propeller troubleshooting in field, and dynamic balance commissioning of propeller and rotor. 　　D3.起落架维修Landing gear 　　公司具有空中国王350飞机、空中国王C90飞机、运十二飞机、运5飞机的起落架翻修能力，并获得美国德士龙公司维修授权。 　　Brief description: our company has overhaul capability of landing gear of King Air 350, Y-12 and Y-5, and has obtained maintenance authorization of Textron.