Aviation Maintenance Technician Handbook – Airframe (FAA-H-8083-31B) was developed as one of a series of five handbooks for persons preparing for mechanic certification with airframe and powerplant ratings, or both. This handbook will provide basic information on principles, fundamentals, and technical procedures in the subject matter areas common to the airframe rating. This book was supersedes FAA-H-8083-31A both Volumes I and II.