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 CRACK INTERNALLY RT HORIZONTAL STABILIZER RIB 10A BETWEEN FRONT SPAR AND MID SPAR, UPPER RIVET ROW JUST AFT OF 6TH RIVET FROM FRONT SPAR. DRILLED AND APPLIED ALODINE NEW RIB 10A OF RT HORIZONTAL STAB REF SRM 51-40-02 AND 51-23-04. INSTALLED NEW NEW RIB 10A OF RT HORIZONTAL STAB REF SRM 51-40-08. A/C REMAINS IN CHECK.