EE HAD AN ACCIDNE T WALKING ACROSS THE PARKING LOT, TRIPPING OVER A CONCRETE PARKING BLOCK. EE WAS TAKEN TO DR.'S OFC. AND HIS XRAY WAS NEGATIVE , EE RETURNED TO WORK FULL DUTY. EE'S KNEE DID NOT IMPROVE. WAS SENT TO ORTHOPEDIST FOR AN MRI.MRI SHOWED FLOATING CARTILAGE ON RT. KNEE. EE OPERATED ON 11-15-00. LOST TIME BEGAN ON 11-15-00.