What was found
CORROSION - DURING C04 CHECK, EGAT MECHANIC FOUND LONGERON SURFACE LOCATED ON CENTER CARGO UNDER FLOOR AT LONGERON 51 LEFT AT STA 1601 TO STA 1621. REPAIRED DAMAGED AREA PER MD-11 SRM 53-00-05, REPAIR 1, REV 50. CONDITION CHECK NORMAL AND JOB COMPLETED.