The UH-60 Black Hawk helicopter is the U.S. Army’s primary medium-lift utility transport and air assault aircraft. It is a twin-engined medium-lift utility helicopter. It is equipped with a single 4-bladed rotor and a single 4-bladed tail rotor. The basic crew complement for the UH-60A is three: pilot, co-pilot and crew chief. The titanium-cored rotor blades are resistant to AAA (anti-aircraft artillery) fire up to 23mm and are equipped with pressurized sensors capable of detecting loss of rotor pressurization (damage).