A RNS overhauled engine puts you back in flight in no time. Exchange your like-model complete operating engine for full core value and update to the most current features and parts backed by a Lycoming warranty. RNS tests overhauled engines and components above and beyond the minimum accepted values to the exact specifications they need. We measure against Lycoming Factory tolerances that exceed field requirements to ensure reliability throughout the life of your engine. We also hot test every engine before it leaves the factory.