A factory rebuilt engine gives pilots and aircraft owners a zero-time engine log book while also increasing the value of their aircraft. With the RNS Engine Exchange Program, you can stay in the air until your replacement engine arrives. Every RNS engine, whether new, rebuilt, or overhauled, travels down one assembly line in our factory to maintain consistent quality control and assembly processes from start to finish. Lycoming’s durability, reliability, and customer support cannot be reproduced.