What was found
THREE DIAMETERS OF TUBE ASSY ARE PLASMA COATED. ASSY IN QUESTION WAS RETURNED AS UNREPAIRABLE DUE TO EXCESSIVE PLASMA COATING THICKNESS. REPAIR CAUSE FOR THE REMOVAL OF EXISTING PLASMA AND RE-APPLICATION. ORIGINAL OR REPAIRED AREAS WERE SHOWING AT LEAST TWICE THE ALLOWABLE THICKNESS. THIS CONDITION COULD CAUSE THE COATING TO BREAK AWAY FROM PARENT METAL AND CAUSE A PROBLEM.