What was found
(CAN) UPON REMOVAL OF LT WING, BOTH FWD AND AFT AILERON CABLES WERE FOUND WITH BROKEN STRANDS AT WING STA 71.125. CABLES RUN THROUGH REAR RIB OF WING, AND RUN OVER A PHENOLIC CABLE GUARD. CHAFFING WITH THIS GUARD IS CAUSE OF STRANDS BEING BROKEN. THERE IS NO INSP PANEL IN OR NEAR THIS AREA. A BOROSCOPE IS NEEDED TO EFFECTIVELY INSPECT CABLES AND GUARD FOR WEAR. HAVE INSTALLED INSP PANELS ON BOTH WINGS AT STA AND PLAN TO DO SO ON THE REST OF MODELS. CABLES HAVE BEEN REPLACED.