Petty Officer Third Class Camron R. Willey, of El Cajon, Calif. (l.), a student at the Coast Guard's Aviation Technical Training Center, installs the tail rotor hub assembly for an MH-65 helicopter with fellow aviation maintenance technician Petty Officer Second Class Andrew D. Metheny, of Glendale, Ariz., March 18, 2014. Students in the four-week Aviation Maintenance Technician MH-65 Airframe & Powertrain course learn the necessary skills, knowledge, and practical experience required to service, maintain, and repair airframe and powertrain systems and associated equipment on the MH-65 Dolphin helicopter. AMTs in the Coast Guard may fill a variety of aircrew positions including flight engineer, flight mechanic, loadmaster, dropmaster, sensor-systems operator, or basic aircrewman.