What was found
DURING 'C' CHECK, MAINTENANCE FOUND CENTER WING BOX UPPER SKIN BETWEEN BL 0 AND RBL 24.5 AND STR 18-21 CORRODED. INSTALLED REPAIR IAW DHC SK 915-577 AND ENG FILE NR 727-57-1071.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING 'C' CHECK, MAINTENANCE FOUND CENTER WING BOX UPPER SKIN BETWEEN BL 0 AND RBL 24.5 AND STR 18-21 CORRODED. INSTALLED REPAIR IAW DHC SK 915-577 AND ENG FILE NR 727-57-1071.