What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON FWD FUSELAGE FLOOR STRUCTURE, AT RBL 11 AND FR 13 + 5". CORROSION FOUND ON SEAT TRACK PREVIOUS REPAIR; REF AAR NR 53-367 AT FWD FUSELAGE FLOOR STRUCTURE, AT RBL 11 AND FR 13 +5'". SEAT TRACK REPAIRED IAW ETD 2018 -190-013057 AND JB EC E 18-087-01.