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 LEFT WING SPAR 2 A3 HOLE HAD CRACK LIKE INDICATIONS. MAINTENANCE REPAIRED THE LEFT WING SPAR 2 A3 HOLE IAW EMB SB 170-57-0053 REV1 PART 3. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.