Renner Aviation We are a small aircraft maintenance repair shop in the beautiful foothills of the California Sierra Nevada Mountains. We are only 2 hours from Yosemite and 3 hours from San Francisco. Hiking, fishing and boating are just a few of the many activites that are only a short drive away or out your back door. Bear ValSki Resort is only an hour and a half up the hill. We have a very loyal customer base and work on a variety of general aviation planes. We are famly owned and operated and pride ourselves on having a family friendly environment. We are enthusiastic about airplanes and love to fly.