Petty Officer 3rd Class Camron R. Willey (far left), of El Cajon, Calif., asks questions of his instructors, Petty Officer 1st Class Brandon Easley (top center), of Bluffs, Ill., and Petty Officer 1st Class Mark Petre (far right), of Kansas City, Mo., while other aviation maintenance technicians in his class practice conducting a main rotor head range check on the MH-65 Dolphin helicopter, March 19, 2014. Students in the four-week Aviation Maintenance Technician MH-65 Airframe & Powertrain course at the Coast Guard's Aviation Technical Training Center 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.