What was found
THE RUDDER CONTROL CABLES PASS THROUGH A PLASTIC GUIDE TUBE BETWEEN WING AND FUSELAGE. THIS GUIDE TUBE IS NOT SUPPORTED AT AFT END. IT IS TOO SHORT TO PASS THROUGH THE SUPPLIED SUPPORT CLAMP. SB560XL-27-20 ADDRESSES THIS CONDITION BUT IS NOT APPLICABLE TO THIS SN ACFT. ON THIS ACFT, THE INTENT OF THE SB WAS INCORPORATED DURING PRODUCTION. REPLACEMENT OF THE GUIDE TUBE WITH A LONGER TUBE WOULD CORRECT THE PROBLEM BUT DUE TO ACCESS DIFFICULTY, REPLACEMENT IS NOT REALLY FEASIBLE. MFG ENGINEERING SUPPLIED DWGS TO CORRECT THE SITUATION ON THIS ACFT.