What was found
DURING C-CHECK, DISCREPANCY AS FOLLOWS, NR 3871, FR. 30 - FR. 38.2 LBL 18 SEAT TRACK FLANGES CORRODED OUT OF LIMITS IAW SRM 51-40-11. REMOVED SEAT TRACK FROM FR. 30- FR 38.2 AT LBL 18 IAW SRM 51-30-30. REPLACED SEAT TRACK IAW SRM 51-10-40. INSTALLED NEW SEAT TRACK FROM FR 26.5 - FR 38.2 AT LBL 18 IAW SRM 53-10-10 / 51-10-40. TREATED AND PRIME AND POLYWHITE IAW SRM 51-40-10 AND A-300 SRM 51-40-12. MATERIAL USED FOR SEAT TRACK, 60-22457, PO 24302234.