EE WAS ATTEMPTING TO CHECK OUT MOTION SWITCH ON #1 APRON. HOT DUST WAS AROUND TAILWHEEL AREA AND HE CLIMBED BACK TO SWITCH ON SIDE AND GOT ON N SIDE HE HIT A PILE OF HOT DUST AND IT GOT DOWN I N EE S BOOTS CAUSING 2ND AND 3RD DEGREE BURNS ONBOTH OF HIS ANKLES.