What was found
INSPECTION TYPE:C AFT CABIN SEAT TRACK SUPPORT AT STA 1996, LONGERON 27L, ADJACENT LBL 1 07.25 SEAT TRACK LOWER SURFACE FOUND CORRODED. CORROSION ON STIFFENER REMOVED PER SRM 51-21-01 VOL II REV 38. ORI THK 0.071", MATL REMOVED 0.040", MATL REMAINED 0.031" FOUND OUT OF LIMIT PER SRM 53-00-01 FIG 3 VOL I REV 38. STIFFENER FAB USING MATL 7075-0-0 .071" AS PER DWG ACA7145. NEW STIFFENER INSTALLED AS PER SRM 51-31-01 VOL II REV 38.