What was found
AFTER SEAT TRACK REMOVAL INSIDE MAIN CABIN BETWEEN STA 1076 AND STA 1180 AT RBL 24. FASTENER HOLES OBSERVED WITH COUNTERSUNK KNIFE EDGE. R & R SEAT TRACK FABRICATED IAW DWG 144N5021, SHT 1, REV A AND INSTALLED IAW DWG 144N5001, SHT 3, REV A. REPAIR IS CLASSIFIED AS MAJOR.