What was found
AFTER SEAT TRACK REMOVAL, INSIDE MAIN CABIN BETWEEN STA 1076 AND STA 1180 AT LBL 45. FASTENER HOLES OBSERVED WITH COUNTERSUNK KNIFE EDGE. REMOVED AND REPLACED WITH SEAT TRACK FABRICATED IAW DWG 144N5021, SHT 1, REV A AND INSTALLED IAW DWG 144N5001, SHT 3, REV A. REPAIR IS CLASSIFIED AS MAJOR.