What was found
LEFT WING INBD TE PANEL UPPER BEAM CAP IS CRACKED & CORRODED AT WS 280 JUST INBD OF LT MLG. REMOVED UPPER SKIN PANELS, REMOVED LT WING INBD TE UPPER BEAM CAP & REPLACED UPPER BEAM CAP IAW SRM 51-40-02 PARA 4 B & PARA 7D, REINSTALLED UPPER SKIN PANELS IAW SRM 51-40-02. SDR INFO CORRODED L2, PN 113T1623-157, SN NA, PART NAME UPPER CHORD, STRINGERS & WS LOCATION ON ACFT WS 281.0 TO AFT OF REAR SPAR. ACFT WAS GNDED.