As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND RT LOWER CF3 SEAT TRACK BEAM IS CORRODED FROM FRONT OF BEAM 98.5" AND 129.5". MAINTENANCE BLENDED CORRODED AREAS AND FOUND TRACK BEAM TO BE IN LIMITS IAW ETD 2011-170/01766 REV C. THE AIRCRAFT WAS RELEASED FROM HEAVY CHECK 10-22-2011.