What was found
DURING HEAVY CHECK, THE RT SEAT TRACK EXTENSION AROUND NUT PLATE HOLE 4, FORWARD OF FRAME 87 WAS CORRODED. MAINTENANCE R & R AFT WET AREA RT SEAT TRACK EXTENSION IAW SRM 51-40-02, 51-42-01, REF CONTINUATION CARD FOR WORK DETAILS, VP 021565-2015/593 C1-C2.