EMPLOYEE WAS HELPING INSTALL A SPILLBOARD ON THE WALK SIDE OF THE SECTION FEEDER. THE SPILLBOARD HAD BEEN RIGGED TO A RED DEVIL HOOK WITH A 1/4"" CHAIN & THE EMPLOYEE WAS GUIDING IT TO ALIGN INSERTS WITH THE HOLES. THE RIGGING BROKE AND THE SPILLBOARD FELL PINCHING HIS LEFT HAND BETWEEN SPILLBOARD AND FEEDER.