As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION INTERNAL CAVITY LEADING EDGE ON RAIL LOCATED AT OFSS 288 AND SS 53 ON BOTTOM SURFACE AT LEVEL OF RIB 8 AT LT WING. REPLACED RAIL LOCATED LEADING EDGE AT OFSS 288 AND SS 53 ON BOTTOM SURFACE AT LEVEL OF RIB 8 AT LT WING IAW SRM 51-10-02 AND B737-700 51-40-02.