As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS IN FOR HEAVY CHECK, LEVEL TWO CORROSION WAS FOUND ON LT SEAT TRACK BEAM AT FR 16 TO FR 19. THIS WAS ALSO CLASSIFIED AS A MAJOR REPAIR. MAINTENANCE REQUESTED EMB ENGINEERING SUPPORT AND RECEIVED ETD 2010-170/05632. MAINTENANCE REPAIRED PER THE ETD.