EE WAS CHANGING OUT A FUEL NOZZLE ON A LUBE TRUCK AND THE WRENCH HE WAS USING SLIPPED OFF OF NOZZLE AND CAUSED HIS ELBOW TO TWIST. THIS CAUSED HIM TO HAVE SHARP PAIN IN HIS ELBOW. THE EE MADE AN APPOINTMENT TO SEE THE DR. ON MONDAY, MAY 22,2001. DR EXAMINED HIS & SAID THAT HE HAS TENDONITIS IN IT. HE HAD BEEN TREATED 3 WEEKS PRIOR TO THIS INCIDENT FOR THE SAME PROBLEM/ SAME ELBOW.