What was found
EN ROUTE, THE LEFT WING TRAILING EDGE PANEL INBOARD OF NR 6 SPOILER BEGAN FLUTTERING WITH SUBSEQUENT INFLIGHT SEPARATION OF APPROXIMATELY A 30 INCH BY 50 INCH SECTION. CONTINUED TO NRT WITHOUT FURTHER INCIDENT. REPLACED THE TRAILING EDGE PANEL AND THE INBOARD FOREFLAP (P/N 65B39011-13) AND REPAIRED THE INBOARD MID FLAP, UPPER INBOARD SURFACE PER SRM 51-10-01 PARA 9 PG 18.