Private-Public Partnership to Preserve Jobs in the Aviation Manufacturing Industry Act of 2020 This bill authorizes the Department of the Treasury, coordinating with the Department of Transportation, to partner with employers to supplement compensation of employees financially impacted by the COVID-19 (i.e., coronavirus disease 2019) public health emergency and to facilitate the effective economic recovery of the aviation manufacturing industry. Additionally, Treasury may partner with an aviation manufacturing company to provide to the employer a public-partner contribution, that together with the private-partner contribution, shall constitute an amount sufficient to maintain the total compensation level of the at-risk employee group for a period not to exceed one year.. Any authority established by this bill and any agreement entered into by Treasury under this bill shall end on April 30, 2021.