As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE ON THE RT SIDE HORIZONTAL STABILIZER, CRACKS WERE ON 2 RIB SECTIONS. CRACKS WERE DETECTED ON RIBS PN 89T920543, STA 138.858 AND PN 89T1029-1, STA 80.608. THESE CRACKS WERE FOUND ON THE UPPER FWD LEADING EDGE TABS WHERE THE RIB ATTACHES TO THE HORIZONTAL STAB SKIN. RIBS WERE REPAIRED IAW THE STRUCTURAL REPAIR MANUAL. (K)