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 RIGHT HORIZONTAL STAB LEADING EDGE RIB 4 CRACKED. MAINTENANCE REPAIRED THE RIGHT HORIZONTAL STABILIZER RIB 4 IAW ETD 2013-170-005367. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.