What was found
CORROSION ON PASSENGER CABIN SEAT TRACK AT RBL 45 BS 560+2; BS 580+1; BS 580+4; BS 640+8. / [01] REMOVED CORROSION FROM SEAT TRACK WITH A MAX MATERIAL LOSS OF .021 ON THE TOP OF THE TRACK. FOUND TO BE OUT OF LIMITS USING TOOL ID # ATS2677 NO S/N CAL DATE 11/21 DUE 11/22. IAW SRM CH 53-00-52-1A-1.;[02] VERIFIED CORRECTIVE ACTION 1;[03] REMOVED SEAT TRACK PASSENGER CABIN AT RBL 45 FROM BS 540 TO BS 727B IAW SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW SEAT TRACK PASSENGER CABIN AT RBL45 FROM BS 540 TO BS 727B IAW SRM 51-40-05-0G-0 AND DWG 143A5300;[05] VERIFIED RECEIPT OF ATSHFAB-100-313 SEAT TRACK AND CONFORMED FABRICATION TO BOEING DWG# 144A5350- REFERENCE JOB NUMBER #539867. VERIFIED CORRECTIVE ACTION 3 AND 4. PART MARK PER QCM 4.35.26 STILL REQUIRED.;[06] PART MARKED SEAT TRACK PER QCM 4.35.26 OK TO INSTALL;[07] STEP 1 COMPLETED; OK TO INSTALL GIVEN.;[08] INSTALLED NEW SEAT TRACK AT BS 540 TO BS 727B RBL 45 WL 208 IAW SRM 51-40-02 AND DWG # 144A5300;[09] REJECTED INSTALLATION OF SEAT TRACK DUE TO FASTENER AT BS 663+6 INSTALLED INCORRECTLY; SEE STEP 2 FOR REJECTION.;[10] REMOVED AND INSTALLED THE FASTENER AT BS 663+6' CORRECTLY IAW SRM 51-40-02-0G-0 AND DWG 144A5300.;[11] COMPLETED STEP 2 AND VERIFIED CORRECTIVE ACTION 10.;[12] VERIFIED MEASUREMENT TABLE