12 Month c/w May 2026 / Next Due May 2027 24 Month c/w May 2026 / Next Due May 2028 36 Month c/w May 2025 / Next Due May 2028 1B (1600 Hr.) c/w at 5,938 Hrs / Next Due 7,538 Hrs 2B (3,200 Hr.) c/w at 5,938 Hrs / Next Due 9,138 Hrs 1C c/w May 2022 / Next Due May 2028 2C c/w May 2016 / Next Due May 2028 3C c/w May / Next Due 2022 May 2040 4C Due May 2028