What was found
AFT CARGO FRAME STATION 1841 UPPER CHORD HAS CORROSION UNDER NUTPLATES FROM LONGERON 43L TO 43R. REMOVED CORROSION FROM -43 SUPPORT AT FS 1841 IAW SRM 51-21-01. ORIGINAL THICKNESS .125, .079 MATERIAL REMAINING. OUT OF LIMIT IAW SRM 53-00-01, FIG 1B, PG 12. RECEIVED REPLACEMENT SUPPORT PN AGA7170U43. LOCATED & DRILLED SUPPORT IAW SRM 51-31-01 & DWG AGA7170U43, REV B, SH 1. INSTALLED -43 SUPPORT & SURROUND STRUCTURE IAW SRM 51-31-01 & DWG AGA7170, REV B, SH 1. CLASS 1 MINOR REPAIR.