What was found
B757-53-3-0480: I/B SEAT TRACK HAS EVIDENCE OF CORROSION BTWN BS 1300 AND 1320 ON RBL24. REF HAECO GSO NR 9282683 BLENDED CORROSION PER B757 SRM 53-00-52 AND FOUND TO BE OUT OF L IMITS. REMOVED SEAT TRACK IAW B757 SRM 53-00-52 R1. MACHINED 1EA REPAIR SEAT TRACK SECTION IAW B757 SRM 53-00-52. LOCATED AND DR ILLED SEAT TRACK, 2 REPAIR ANGLES AND REPAIR STRAP IAW B757 SRM 53-00-52 REPAIR 1 AND BAC DWG 146N5133 REV B. INSTALLED NEW SEAT 9. CATEGORY A REPAIR. REF HAECO GSO MECH V912642/INSP QC302/V90187 FLOORPANELS THAT WERE REMOVED 251DF, 252AF IAW ECRA 5100-01844. FIG 201 SHT 3 DETAIL I AND BAC DWG 146N5133 REV B. REINSTALLED TRACK SECTION AND ATTACHING PARTS IAW B757 SRM 53-00-52 REPAIR 1