What was found
FWD CARGO LOWER MAIN SILL RBL 44.9 AFT OF ST 605 TO STA 632 HAS CORROSION ON INNER CHORD AND UNDERLYING ATTACH STRUCTURE. INNER CHORD, FAIL SAFE STRAP AND 5 EA BACK UP FITTINGS FOUND OUT OF LIMITS. REMOVED AND REPLACED INNER CHORD, FAIL SAFE STRAP AND 4 EA BACKUP FITTINGS (STA 561.95), IAW B767 SRM 51-40-02-0G-0, FAS EA 20038 REV IR. REPAIRED 1 EA BACK UP FITTING (STA 545.5), IAW FAS EA 20039 REV IR AT STA 522-632 RBL 44.5 FWD CARGO LOWER SILL (BACKUP FITTINGS OFF PART: P/N 143T8022-3, NSN).