What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE LOWER RT SEAT TRACK BEAM AT CF3, FR'S 74-85. MAINTENANCE REMOVED AND REPLACED THE RT SEAT TRACK BEAM AT CF3, FR'S 74-85 IAW EMB 170 SRM 51-41-01, 51-43-02, 51-43-01 & 51-40-02. A/C IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.