Abstract: An aircraft theft protection apparatus has two mating parts that encapsulates an electrical power connecter when the electrical power connector is removed from the aircraft's electrical power source. When the electrical power connector is removed the electrical power to the aircraft is interrupted preventing the aircraft from starting its engines. When the two mating parts are fitted together a unique space is provided which allows the electrical power connector to fit closely therein, which is a first theft prevention apparatus. When the electrical power connector is encapsulated within the inventive locking apparatus, a pin-like lock having a non-duplicating key locks the two mating parts together which again prevents the electrical power connector to be reconnected to the aircraft's electrical power source.