As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT SCHEDULED INSPECTION, DISCOVERED (3) SPOTS OF CORROSION ALONG FRAME 23 BETWEEN STRINGERS 20L AND 20R. CORROSION DID NOT PENTRATE TO FRAME 23, OR STRINGERS, REMOVED DAMAGED AREA AS ONE ENCOMPASSING AREA AND INSTALLED EXTERNAL DOUBLER. REFERENCE MFG ENGINEERING DOCUMENT ICA2007-120/09243.