What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, MAINTENANCE REPORTED LEVEL 2 CORROSION ON THE RT I/B SEAT TRACK BETWEEN FRAMES 78 & 82. MAINTENANCE REMOVED AND REPLACED THE RT I/B SEAT TRACK BETWEEN FRAMES 78 & 82 IAW SRM 51-43-03, 53-23-10, 51-40-02 & 51-23-06. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.