Checkliste zweispaltig links Liste, rechts Abbildung passend zum aktiven Listen-item

% !TeX lualatex
\documentclass[smaller]{beamer}
\usepackage[ngerman]{babel}
\setbeamertemplate{caption}{\raggedright\insertcaption\par}
\setbeamercovered{transparent}
\begin{document}
\begin{frame}[t]
  \begin{columns}
    \begin{column}{.48\textwidth}
      \begin{enumerate}[<+->]
        \item Helmet: Put on 
        \item AN/ALE-40 Chaff Dispenser: OFF
        \item Throttles: AFT
        \item UHF Radio: OFF
      \end{enumerate}
    \end{column}
    \hfill%
    \begin{column}{.48\textwidth}
      \begin{figure}
        \centering
        \includegraphics<1>[scale=0.2]{example-image} 
        \only<1>{\caption{Helmet type}}
        \includegraphics<2>[scale=0.3]{example-image} 
        \only<2>{\caption{Chaff dispenser switch}}
        \includegraphics<3>[scale=0.1]{example-image} 
        \only<3>{\caption{Throttles control}}
        \includegraphics<4>[scale=0.2]{example-image} 
        \only<4>{\caption{Radio}}
      \end{figure}
    \end{column}
  \end{columns}
\end{frame}
\end{document}