An aircraft technician performs maintenance and repair on various types of aircraft, most commonly commercial planes, fighter jets, and helicopters. Some aircraft maintenance technicians work on blimps and hot air balloons. As an aircraft technician, your job duties include identifying and diagnosing mechanical and electrical issues, manual testing of aviation communication and diagnostic systems, and replacing defective or worn-out parts. You may specialize in a particular type of aircraft or in working on a specific part of an aircraft, such as the frame, wings, engine, electrical systems, or aviation software applications.