Students, led by Petty Officer 1st Class Jeanette Nowadnick, of Langhorne, Pa., an instructor at the Coast Guard's Aviation Technical Training Center, observe as Petty Officer 3rd Class Danny S. Gonzalez, of Tampa, Fla., completes a main rotor head range check on an MH-65 Dolphin helicopter March 19, 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.