What was found
LEADING EDGE UPPER RIB LOWER STIFFENER IS CRACKED ON AFT END AT WS 520 NR 5 SLAT AREA OTBD. INSTALLED NEW CHORD IAW SRM 51-40-2 & 51-40-05. TREATED & PRIMED IAW SRM 51-21-02, DINETROLED IAW SOPM 51-21-02. CRACKED 1.35 INCHES, PN 114T2206-5, SN NA, PART NAME CHORD, STR & WS LOC ON ACFT LT WING WS 520. ACFT WAS GNDED.