As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRACK ON RAIL NUT-PLATE LOCATED OFSS 604 INTERNAL CAVITY LEADING EDGE AT LT WING. REPLACED RAIL NUT-PLATE AND FASTENERS LOCATED ON OFSS 604 AT INTERNAL CAVITY OF LEADING EDGE OF LT WING IAW B737-800 SRM 51-40-02-0G-0 AND DRAWING 112A4402; SHEET: 41; REV: A.