What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE RIGHT I/B SEAT TRACK, PAX CABIN CF1. MAINTENANCE REMOVED AND REPLACED THE RT INBOARD SEAT TRACK PAX CABIN CF1 IAW EMB 170 SRM 51-43-01, 51-43-02, 51-43-03 & 51-43-04. A/C IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.