EMPLOYEE WAS PERFORMING MAINTENANCE WORK, REPAIRING HINGES ON A STEEL DOOR. HE FELT A PAIN IN HIS RT. SHOULDER WHILE PUSHING ON DOOR TO ALIGN HINGES. HE WAS TAKEN TO LOCAL MEDICAL FACILITY WHERE INITIAL DIAGNOSIS WAS A SPRAIN. SUBSEQUENT MEDICAL EVALUATION INDICATES A TORN LIGAMENT THAT WILL REQUIRE ARTHROSCOPIC SURGERY.