2024 49 USC 44722 – Aircraft operations in winter conditions

2023 49 USC 44722 – Aircraft operations in winter conditions

2022 49 USC 44722 – Aircraft operations in winter conditions

2021 49 USC 44722 – Aircraft operations in winter conditions

2020 49 USC 44722 – Aircraft operations in winter conditions

2018 49 USC 44722 – Aircraft operations in winter conditions

2017 49 USC 44722 – Aircraft operations in winter conditions

2015 49 USC 44722 – Aircraft operations in winter conditions

2014 49 USC 44722 – Aircraft operations in winter conditions

2013 49 USC 44722 – Aircraft operations in winter conditions

2012 49 USC 44722 – Aircraft operations in winter conditions

2010 49 USC 44722 – Aircraft operations in winter conditions