This manual covers the Lycoming O-290-D series aircraft engines, a line of piston engines designed for aviation applications. These air-cooled, horizontally opposed, 4-cylinder engines feature a displacement of 290 cubic inches, a bore of 4.0625 inches, and a stroke of 4.375 inches. Engineered to meet FAA certification standards and operate on Aviation Gasoline (Avgas), Lycoming engines are recognized for their reliability and performance in demanding aviation environments. The recommended oil type for these engines is Lycoming recommended aviation engine oil, ensuring optimal operation under standard atmospheric conditions.

This Illustrated Parts Catalog (IPC) in English provides comprehensive information for maintaining and repairing your Lycoming O-290-D series aircraft engine. It details specific parts, their identification, and assembly, crucial for any aviation maintenance task. The manual is designed to be clear and easy to follow, with features such as chapter bookmarks and search functionality to aid in quick information retrieval. Whether you are an owner, mechanic, or technician, this resource is essential for understanding the components and ensuring the continued airworthiness and optimal performance of your aircraft engine.