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 LT SEAT TRACK BEAM AT FRAME 19. MAINTENANCE PERFORMED MAJOR REPAIR ON THE LT SEAT TRACK BEAM IAW EMB ETD2010-170/07857 REV A. REFERENCE PO 180901 FOR MATERIAL USED. A/C IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.