What was found
DURING 'C' CHECK, MAINTENANCE FOUND CENTER WING BOX UPPER SKIN CORRODED BEYOND LIMITS FORWARD AND AFT OF FRAME 783 RBL 64 BETWEEN STR 15 AND 17. INSTALLED REPAIR IAW DHC 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 CORRODED BEYOND LIMITS FORWARD AND AFT OF FRAME 783 RBL 64 BETWEEN STR 15 AND 17. INSTALLED REPAIR IAW DHC 915-577 AND ENG, FILE NR 727-57-1071.