ON 12/13/01 A MAINTENANCE EMPLOYEE CLAIMED THAT ON 12/9/01 HE WAS PLACING HIS TOOLS IN HIS LOCKER AT THE END OF SHIFT WHEN HE FELT HIS KNEE POP. THREE DAYS LATER WHILE ON VACATION THE EMPLOYEE REPORTED THAT HIS KNEE BEGAN TO BOTHER HIM SO HE SAW HIS PERSONAL PHYSICIAN FOR EXAMINATION AND WAS RELEASED TO FULL DUTY. LATER THE EMPLOYEE WAS REFERRED TO AN ORTHOPEDIC SPECIALIST WHO PRES