What was found
DURING C-CHECK, NR 7 SLAT AT ACTUATOR ATTACH MOUNT INBOARD/OUTBOARD SIDES RIB AND PREVIOUS CRACKED SLAT STA 292. REMOVED NR 7 SLAT IAW B-727 M/M 27-81-11. REMOVED INT ACCESS PANELS AND RIBS (2) AT NR 7 SLAT IAW B-727 SRM 51-30-2. DRILLED NEW HOLES AT RIBS IAW B-727 SRM 51-30-5. INSTALLED NEW RIBS P/N 65-17310-3 AND 65-17310-4 PO 3421124 AND 342176 IAW B-727 SRM 51-30-2. REINSTALLED NR 7 SLAT IAW B-727 M/M 27-81-11. OP'S CHECK GOOD IAW B-727 M/M 27-81-0.