What was found
(CAN) DURING ROUTINE INSPECTION OF RUDDER THE BRACKET IN QUESTION WAS FOUND TO HAVE TWO CRACKS BESIDE THE THRUST SURFACE. DUE TO THE HIGH HOURS OF THIS ASSEMBLY THE THRUST SURFACE WAS FOUND TO HAVE WORN TO HALF OF ITS ORIGINAL THICKNESS. REPAIR TO THE RUDDER ASSEMBLY WAS ACCOMPLISHED BY REPLACEMENT OF ALL SIX HINGE BRACKETS. SUBSEQUENT INSPECTIION OF SIMILAR AIRCRAFT WITH SIMILAR TIME WERE FOUND TO HAVE SAME WEAR PATTERN BUT NO CRACKS PRESENT. FIVE MORE ASSEMBLIES HAD HINGE BRACKET REPLACEMENT DUE TO EXCESSIVE WEAR.