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 MAINTNENACE FOUND THE LEFT HORIZONTAL STABILIZER RIB 11A CRACKED. MAINTENANCE REPAIRED LEFT HORIZONTAL STABILIZER RIB 11A IAW ETD 2013-170-003662. "MAJOR REPAIR" THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.