What was found
LEFT WING INBD AND OTBD RIBS ARE CRACKED WHERE NR 3 LE SLAT ACTUATOR MOUNTS TO SLAT. REMOVED ACCESS PANEL FOR ACCESS IAW 727 SRM 51-30-2. REMOVED INBD AND OTBD RIBS IAW SRM 51-10-1. LOCATED AND DRILLED NEW INBD RIB SUPPORT PN NR 65-17294U14 PO NR 20013120 AND NEW OTBD RIB SUPPORT PN NR 651729U13 PO NR 20013164 IAW B727 SRM 51-30-5. TREATED AND PRIMED RIBS IAW B727 SRM 51-10-2. INSTALLED NEW INBD AND OTBD RIBS AT NR 3 SLAT L/E ACTUATOR ATTACH POINT IAW SRM 51-30-2. INSTALLED ACCESS PANEL IAW B727 SRM 51-30-2.