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 EXTENSION FROM FR 87 TO FR 88. MAINTENANCE REMOVED AND REPLACED SEAT TRACK EXTENSION PER EMB SRM AND IC 2008-170/04983A. AC RELEASED AFTER COMPLETION OF HEAVY CHECK.