As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, MAINTENANCE FOUND A CRACK ON THE LT WING UPPER SKIN AT SPAR 2, RIB 10. MAINTENANCE PERFORMED A MAJOR REPAIR TO CRACK ON THE LT WING UPPER SKIN AT SPAR 2, RIB 10 IAW EMB ETD'S 2011-170-104208 REV B AND 2011-170/02998. REFERENCE PO 000587-2010 FOR FABRICATION OF PART. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK.