Bengaluru, March 16 -- ISRO on Saturday said it has successfully conducted the flight acceptance hot testing of the cryogenic engine identified for the sixth operational mission of LVM3 launch vehicle (LVM-M6) at ISRO (Indian space research organisation) Propulsion Complex, Mahendragiri in Tamil Nadu. The cryogenic engine of every mission undergoes hot testing as part of its acceptance process for the flight, ISRO said in a statement. Hot tests for the indigenous cryogenic engine (CE20) used in the Cryogenic Upper Stage of LVM3 were so far performed at the High-Altitude Test (HAT) facility at ISRO Propulsion Complex (IPRC) where vacuum conditions are simulated with complex installations, limiting the maximum hot test duration to 25 seconds....