What was found
LEADING EDGE UPPER RIB STIFFENER CRACKED ON AFT END AT WS 550 NR 4 SLAT AREA, INBD. INSTALLED NEW STIFFENER PART 114T2207-5 IAW SRM 51-40-05, & 51-40-02. APPLIED CIC IAW SOPM 20-41-05 NR 75 900444. CRACKED .923, PN 114T2207-5, SN NSN, PART NAME STIFFENER, STR & WS LOC ON ACFT WS 550, LE AIR LOAD RIB STIFFENER LT WING. ACFT WAS GNDED.