Arthur Griffiths, a civilian instructor at the Coast Guard's Aviation Technical Training Center, teaches Petty Officer 2nd Class Gabriel E. Grise, of Goshen, Ind., how to perform maintenance on the rescue hoist of the MH-60 helicopter, while another student in advanced Aviation Maintenance Technician training observes March 18, 2014. Students in the five-week Aviation Maintenance Technician MH-60 Airframe & Powertrain course learn how to conduct maintenance on the Coast Guard's MH-60 Jayhawk helicopter: How to select the correct repair procedure, conduct appropriate function checks and complete the repair to return the aircraft to service. 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.