Hindustan Aeronautics Limited engages in the design, development, manufacture, repair, overhaul, upgrade, and servicing of aircraft, helicopters, aero-engines, avionics, accessories, and aerospace structures in India and internationally. The company provides power plants; materials, including castings, general and precision forgings, powder metallurgy products, rubber products, rolled rings, and composites; and aerospace products, which include structures, tanks, and cryogenic engines.