EE SAID THAT ON 6/23, HE WAS WORKING IN THE DRAGLINE WALK BOX. HE WAS TIGHTENING BOLTS IN A PLACE THAT REQUIRED HIM TO WORK THROUGH SPOKES IN THE GEAR - A TIGHT POSITION PLUS WORKING WITH ARMS OUTREACHED, HOLDING A 1"" IMPACT WRENCH. HE DEVELOPED PAIN IN HIS ARM, & WHEN HE WAS STILL EXPERIENCING THE PAIN ON 6/26, HE FILED AN INCIDENT REPORT. BY 6/30 HE STILL HAD PAIN & REQUESTED DR.