The AGMA Aerospace Gearing committee is seeking new committee members to revise AGMA 926-C99, Recommended Practice for Carburized Aerospace Gearing. Specifically, metallurgy and heat-treating experts are needed. This information sheet recommends material case properties, microstructure, processing procedures, and other critical parameters for carburized aerospace gears. Due to the unique requirements of aerospace gearing, such as typically smaller lot sizes, demands for higher precision, and stringent quality requirements, this information sheet aims to provide deeper, aerospace-specific information than other already published metallurgical specifications such as AGMA 923, Metallurgical Specifications for Steel Gearing or AMS2759/7, Carburizing and Heat Treatment of Carburizing Grade Steel Parts.