Aeroderivative Gas Turbine Support, Inc. (AGTSI), is a worldwide provider of replacement and upgrade parts for gas turbine engines. This includes on-engine, off-engine, and package parts for General Electric Industrial and Marine Gas Turbine; i.e. LM2500, LM5000, LM6000 and LMS100 engines, as well as Pratt and Whitney's GG4/FT4.