The Federal Aviation Administration (FAA), Mechanic (Airframe) credential is for mechanics who perform or supervise the maintenance, preventive maintenance or alteration of airframes. Airframe mechanics are authorized to work on any part of the aircraft except the instruments, power plants, and propellers. Airframe mechanics work in hangars, repair stations, or out on the airfield on the 'flight lines' where aircraft park. Mechanic (Airframe) applicants must be at least 18 years old, be able to read, write, speak and understand English, and meet education, training and experience requirements. Applicants must also pass written, oral, and practical exams.