What was found
BS 670 - 681 RBL 24.75 SEAT TRACK CROWN SUPPORT INNER FLANGE FOUND CORRODED. REMOVED IAW SRM 51-10-02 REV 113. REWORKED AREA, MEASURED CLEAN UP DEPTH OF 0.025 INCHES & EVALUATED FOUND EXCEED 20% LIMIT IAW SRM 53-00-52 FIG 101 ALLOWABLE DAMAGE 1 REV 113. SEAT TRACK FABRICATED IAW SRM DWG 143N5119 SHT 2 REV. OUT OF LIMIT SEAT TRACK SUPPORT REMOVED IAW SRM 51-40-02 REV 113. NEW SEAT TRACK SUPPORT INSTALLED AT STATION 600 - 700 RBL 24.75 IAW DWG 143N5080 SHT 24 REV C. REPAIR CLASSIFIED AS MAJOR.