As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE INSPECTION, IT WAS DISCOVERED THAT THE LEFT WING NR 4 SLAT INTERIOR RIB WAS CRACKED AT WS 410, OUTBOARD OF THE ACTUATOR ATTACH POINT. REPAIR WAS ACCOMPLISHED IAW BOEING 727 SRM 57-50-3, FIGURE 9. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)