Petty Officer 2nd Class Harold Vanleeuwan goes through a maintenance checklist with Petty Officer 1st Class Matthew Weatherhold at Coast Guard Air Station Elizabeth City, N.C., during a maintenance cycle on the propeller of an HC-130 Hercules, Monday, July 29, 2013. Maintenance is required on all Coast Guard aircraft based on the number of hours flown to keep the aircraft in good working order.