As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FS 310 AVIONICS BAY BELOW FLOOR BOARD IN APPROX INBETWEEN STR 25L AND STR25R FRAME FLANGE HAS EVIDENCE OF CORROSION. (C-CHECK) RO: 04/28/2019 REMOVED AND REPLACED LOWER FRAME BETWEEN STR 23L AND STR 23R IAW SRM. PRESSURE LEAK CHECK GOOD.