As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE RIB 52 LEFT WHEEL WELL FORWARD BULKHEAD CRACKED. MAINTENANCE REMOVED AND REPLACED THE LEFT WHEEL WELL FORWARD BULKHEAD RIB COMPLIMENT IAW EMB 170 SRM 51-42-03. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK CMH.