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