What was found
DURING INCORPORATION OF SK 172-149 KIT TO C/W SB 97-1, FOUND RT AILERON DIRECT CABLE FRAYED WHERE IT TRAVELS UNDER THE RT OUTBOARD PULLEY LOCATED AT THE LOWER AFT DOOR FRAME AREA. THIS IS A VERY DIFFICULT AREA TO INSPECT DURING ROUTINE INSPECTIONS. THE FRAYING WAS ONLY VISIBLE ONCE THE PULLEY WAS REMOVED. AT LEAST 8 BROKEN STRANDS, 16 ENDS, WERE VISIBLE. SUBMITTER RECOMMENDED REMOVING PULLEYS EVERY 5,000 HOURS OR INSTALL INSPECTION PANELS AFT OF THE PULLEY FOR PROPER INSPECTION.