aircraft engine overhaul experts since 1945
An Overhaul Process Built on Experience Penn Yan Aero’s overhaul process is backed by more than 80 years of experience and thousands of Lycoming and Continental engines rebuilt for aircraft operating worldwide. Our FAA-approved proprietary techniques produce smoother-running, longer-lasting engines. When manufacturers collaborate with Penn Yan Aero on product improvements, it’s a clear measure of the trust we’ve earned — and why our overhauls are among the most respected in the industry.
Keep your original engine and benefit from Penn Yan Aero's comprehensive overhaul process. We inspect, repair, and restore your engine using decades of experience, precision machining, and rigorous quality controls to deliver dependable performance and long-term value.
Minimize aircraft downtime with a Penn Yan Aero exchange engine. Receive a professionally overhauled engine built to our established standards while returning your eligible engine core, providing a convenient alternative to waiting for your own engine to be overhauled.
Penn Yan Aero offers Supplemental Type Certificate (STC) engine upgrade packages designed to improve aircraft performance and capability. Explore our SuperHawk, RAM 160, and DeltaHawk conversion options, providing proven solutions for increased horsepower, improved climb performance, and enhanced aircraft utility.
Our dedicated in-house machine shop provides crankcase inspection, precision machining, and repair services. By maintaining control over these critical processes, Penn Yan Aero supports consistent workmanship, quality oversight, and efficient engine production.
Smooth operation begins with precise balancing. Penn Yan Aero dynamically balances crankshafts and rotating assemblies while carefully weight-matching pistons, connecting rods, and related components to help reduce vibration and promote smooth, reliable engine operation.
Every completed overhaul undergoes controlled testing in our dedicated engine test facilities. Our technicians monitor critical operating parameters, verify performance, and evaluate engine operation before approving the engine for return to service.
Penn Yan Aero guarantees that each overhauled Lycoming and Continental certified piston aircraft engine will be free from defects in materials and workmanship for a duration of three (3) years or until the Original Equipment Manufacturer’s (OEM) Time Between Overhaul (TBO) applicable at the time of overhaul by Penn Yan Aero expires, whichever comes first.
Penn Yan Aero was established in 1945 by Harold Middlebrook. Since then, the company has been continuously owned and managed by the Middlebrook Family. The Middlebrooks are active aircraft owners, pilots, and mechanics. They have focused their attention and resources on Lycoming and Continental aircraft engines; no removals or installations, just engines.The Middlebrooks have attracted talented, like-minded professionals who have joined Penn Yan Aero and have helped hone its practices and capabilities to unmatched levels.
Penn Yan Aero Overhauled Engines are Backed by the Best Warranty in the Industry, Transferable and Supported Worldwide.
Upgrade Your 172 I, K, L, M, N, or P Land and/or Sea Plane to 180 Horsepower.Penn Yan Aero's legendary SuperHawk STC's one of the best investments you can make in your 172.
