What was found
CORROSION, FORWARD WET AREA ON LEFT MOST INBOARD SEAT TRACK SEGMENT FRAME 12 TO FRAME 20/21 IN THE FOLLOWING 2 LOCATIONS: BETWEEN FR 19 AND 20; AND FR 20, AS MARKED. C-CHECK RO 9/8/2020. REMOVED AND REPLACED FWD WET AREA LT INBOARD SEAT TRACK FR 12 TO FR 20/21. NO SIGNIFICANT CHANGE TO WEIGHT AND BALANCE, REF EMB175 SRM.