What was found
NR 4 L/E SLAT ATTACH RIBS ARE CRACKED I/B AND O/B SIDE OF ACTUATOR ATTACH POINT. REMOVED TEMP REPAIR ON OTBD RIB OF ACTUATOR ATTACH POINT AND BEGAN FABRICATION OF RIB DOUBLERS PER M/M 57-54-0 FIG 804. OK TO INSTALL INBD REPAIR. OK TO INSTALL OUTBD REPAIR. REPAIR PER M/M 57-54-0 FIG 804. COMPLETED INSTALLATION OF REPAIRS IAW M/M 57-54-0 FIG 804.