As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJO - DURING C-CHECK, WHILE REMOVING RT WING INBOARD MID-FLAP TO FACILITATE OTHER MAINTENANCE OBSERVED TWO RIBS CRACKED AT WBL 87.7. NEWS RIBS FABRICATED BY COOPESA MACHINE SHOP AS PER COOPESA EO NR C00-3-57-330-98. INSTALLED IAW SRM 51-10-1 PAGE 5 AND 51-30-2. (M)