You are probably not familiar with the U.S. Federal Aviation Regulations. For an FAA-registered aircraft to be airworthy, it must have an inspection within the

You are probably not familiar with the U.S. Federal Aviation Regulations. For an FAA-registered aircraft to be airworthy, it must have an inspection within the past 12 calendar months signed off by a specially trained, examined, and certified Airframe and Powerplant (A&P) mechanic further trained, examined, and certified with Inspection Authority (IA). Airplanes flown for hire, such as commercial airliners, must have the equivalent of an annual inspection every hundred flight hours, also signed off by an IA.