Hindustan Aeronautics Ltd announced that an Expression of interest was exchanged between the company and General Atomics Aeronautical Systems Incorporated for providing MRO support for turbo-propeller engines that power the state-of-art MQ-98 Guardian High Altitude Long Endurance (HALE) Remotely Piloted Aircraft System (RPAS) manufactured by GA-ASI, for the Indian market, via an exchange filing.