On 26 May 2012 a double-deck train leaded by 146 023 derailed at Aachen Hbf, apparently during a shunting movement from the storage sidings to the platform. At the time the picture was taken the rerailing of the second car was in progress, the other cars (which probably did not derail) had already been uncoupled. Note the earthing hook in front of the loco.
Digital photo by Christoph Schmitz (christoph.schmitz2@post.rwth-aachen.de)