As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND LH INBD SEAT TRACK FLOOR FLANGE HAS SEVERAL SPOTS OF CORROSION AT FR 19-20 WITH 100% MATERIAL LOSS AT FR 19. REMOVED AND REPLACED L-H I/B SEAT TRACK FR 12-20. REF EMB SRM 51-40-08. A/C REMAINS IN CHECK.