Grand Trunk Western 5629 was a 4-6-2 K-4a steam locomotive built by American Locomotive Company (ALCO) in 1924, for the Grand Trunk Western Railroad. It was a copy of the USRA Light Pacific locomotives. It became famous after being purchased by Richard Jensen for use in pulling several excursion trains in the Chicago area throughout the 1960s. After Jensen ran into some financial trouble, No. 5629 was put into storage at the Rock Island Railroad's Blue Island, Illinois freight yard. No. 5629 was subsequently the subject to a legal battle between Jensen and Metra Commuter Rail in the mid-1980s, and it ultimately led to the locomotive's scrapping in July 1987.