What was found
FLT 6401 BOS-BNA, ON HEAVY MAINTENANCE CHECK FOUND AFT CABIN RIGHT SEAT TRACK HAS CORROSION AT FR 84 AS MARKED P/N 170-86082-005. REPAIRED BY BLENDING TO REMOVE CORROSION, HFEC, FILL AND BLEND AREA WITH HYSOL EA9396. INSTALL FABRICATED STRAP WITH EXISTING FASTENERS AND 4 FASTENERS PAST BLEND ON BOTH LEGS OF STRAP, PRIME, TOPCOAT AND FILLET SEALANT APPLIED AS PER EC E12-315-01.