As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS OUT OF SERVICE FOR HEAVY CHECK, MAINTENANCE DISCOVERED LEVEL 2 CORROSION ON THE RT INBOARD SEAT TRACK IN 2 PLACES AT FRAME 77 AND 78. REMOVED AND REPLACED SEAT TRACK FROM FRAMES 74 TO 84 IAW SRM 51-43-01 AND 51-43-02. AC REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.