As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND RH HORIZONTAL STABILIZER RIB 11 HAS SUSPECTED CRACK AT ATTACH FASTENER HOLES TO UPPER SKIN AT STRINGER 2. REMOVED DAMAGED RH HORIZONTAL STABILIZER RIB 11. LOCATED DRILLED AND INSTALLED NEW RH HORIZONTAL STABILIZER RIB 11.