What was found
MAIN CABIN STRUCTURE, SEAT TRACK ADAPTERS AT FRAME 29, RBL 27 - RBL 36 HAS WEAR AND BARE METAL. BLENDED OUT. ORIGINAL THICKNESS 0.472. MATERIAL LOSS 0.035. MATERIAL REMAINING 0.447 FOUND TO BE OUT OF LIMITS IAW SRM 53-10-15. REMOVED AND REPLACED ADAPTER PO NR 649138.2 IAW SRM 51-40-21.