What was found
NUMBER 4 SLAT UPPER LE SKIN SURFACE CORRODED & BUBBLED. NR 4 SLAT CORRODED OUT OF LIMITS. R & R SLAT IAW AMM 27- 581-02, OPERATIONS CHECKED GOOD. SDR INFO LEVEL 2 CORROSION, PN 114T4104-53, PART NAME SLAT, SN 000742, LOC FROM LES 500 TO LES 690. ACFT WAS GROUNDED.