What was found
REAR SPAR TO TE PANEL ATTACH BEAM UPPER CHORD SPLIT ON EDGE AT STATION 285, 50 INCHES FROM REAR SPAR. REMOVED OLD UPPER CORD & INSTALLED NEW UPPER CORD FROM REAR SPAR TO TE PANEL ATTACH BEAM AT STATION 285, IAW SRM 51-40-02. SDR INFO CORRODED, PN 113T1623-158, SN NA, PART NAME CHORD, UPPER LOCATION 50 INCHES FROM RT WING TE AT STATION 285. ACFT WAS GROUNDED.