WHILE OPERATING A LOCOMOTIVE, EMPLOYEE STRUCK HIS RIGHT ELBOW WHEN THE LOCOMOTIVE CAME TO A SUDDEN STOP. INITIALLY, THE INJURY REQUIRED FIRST AID TREATMENT ONLY. HOWEVER, HE CONTINUED TO HAVE PROBLEMS WITH HIS ELBOW. HE WAS REFERRED TO AN ORTHOPEDIC SPECIALIST WHO RECOMMENDED SURGERY WHICH OCCURRED 12/19/03. EMPLOYEE RETURNED 1/5/04 AND RECEIVED FINAL RELEASE FROM DOCTOR 2/12/04.