As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE RT UPPER CF3 SEAT TRACK BETWEEN FRAMES 82-83, - 142 INCHES FROM THE FRONT OF CF3 BEAM. MAINTENANCE REMOVED DAMAGE AND INSTALLED SEAT TRACK SPLICE DEVICE IAW EMB ETD 2011-170/01766.