As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION UNDER ANTENNAS ON KEEL BEAM PANEL AT BS 578 - BS 616 BETWEEN RIGHT AND LEFT AIR CONDITIONING EQUIPMENT BAYS. CORROSION UNDER ANTENNA ON KEEL BEAM PANEL AT STA 578616 FOUND TO BE BEYOND LIMITS, PANEL REPLACED WITH MADE REPAIR PART, MATERIAL IDENTIFIED PER B737200 SRM REV 105 CHAPTER 53302 FIG 3, PANEL INSTALLED IAW CHAPTER 51302.