What was found
(AUS) HF ANTENNA BROKEN AT VERTICAL STABILIZER. SAFETY RESTRAINING DEVICE FAILED TO RETAIN THE BROKEN CABLE AS THE CABLE HAD FAILED ON BOTH SIDES OF THE RESTRAINT CLAMP. THE BROKEN ANTENNA CAUSED NO DAMAGE TO THE AIRFRAME HOWEVER THE SAFETY RESTRAINT, COMPRISING A BOLTED TEFLON FITTING SECURED BY NYLON TAPE, HAD REPEATEDLY IMPACTED THE VERTICAL STABILIZER SIDE PANEL RESULTING IN DELAMINATION, ABRASION AND CRACKING OF THE OUTER SKIN AND DAMAGE TO THE ALUMINUM HONEYCOMB CORE.