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 REPORTED LT WING RIB 10 AT SPAR 2 CRACKED AT 3RD FASTENER FROM REAR. MAINTENANCE REMOVED AND REPLACED RIB 10 AT SPAR 2 ON LT WING IAW EMB 170 SRM 51-43-01, 51-43-02, AND 51-41-01. PART NUMBER 170-32161-011. A/C IS STILL OUT OF SERVICE IN HEAVY CHECK.