EE WAS HELPING TO CVHANGE OUT A FAILED DOUBLE TRUNNION BEARING ON THE LEACH TUBE. AFTER REMOVING THE TRUNNION, EE APPARENTLY STAYED BEHIND TO CHECK THE TIGHTNESS OF THE PINION BEARING BOLTS. A LL OTHER EES HAD LEFT THE AREA. WHILE APPARENTLY CHECKING THE PINION BOLTS, EE FGELL APPROX. 6', BREAKING HIS RIGHT WRIST.