TWO MECHANICS WERE INSPECTING THE TUBULATOR AT 11F HIGH BULK PLANT DURING DOWN TIME PERIOD. AS PANT OF THE INSPECTION, ONE MECHANIC, INJURED EE SPUN THE TURBULATOR TO MAKE SURE THE BLADES WERE NOT CONTACTING THE HOUSING IT ROTATED WHEN HIS LEFT THUMB WAS CAUGHT BETWEEN THE HOUSING AND ONE OF THE BLADES AND PARTIALLY ALVUSED IT.