As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WET L/2 MOPSILL CORRODED IN MULTIPLE AREAS. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-800 SRM 53-70-15-1A-1, REMOVED AND REPLACED INNER CHORD (MOPSILL) IAW BOEING 737-800 SRM 51-40-02-0G-1 W= 2" O= .080 R= .063 L= 1" D= .017.