What was found
DURING C-CHECK AT KSFB, CORROSION WAS DISCOVERED ON SKIN AT STA 1114, LONGERON 18R. MAINTENANCE AT KSFB. REMOVED AND REPLACED LOWER SKIN FROM STA 1087-1121, LONGERON 18R-23R. REMOVED AND REINSTALLED MIDDLE SKIN FROM LONGERON 15R-18R. REMOVED AND REINSTALLED UPPER SKIN FROM LONGERON 11R-15R. REMOVED AND REPLACED LONGERON 15R FROM STA 1087-1121 AND LONGERON 11R FROM STA 1104-1121. REMOVED AND REPLACED STRAP AT STA 1121 FROM LONGERON 13R-23R. REMOVED AND REPLACED FRAME CAP AND SPLICE AT STA 1121 FROM LONGERON 15R-19R. ALL WORK DONE IAW SRM 51-30-04.