The final training step is the Composite Maintenance Trainer (CMT), a full-scale mock-up of the CH-53K aircraft, including replicas of its three T408 engines. Training will begin at Marine Air Corps Air Station (MCAS) New River in Jacksonville, North Carolina. David Karcher, a Lockheed Martin senior specialist mechanic explained, “The benefit to a trainer like this is to create an environment that is somewhat realistic to a real aircraft but has safety in mind.”