As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 20MM (.78") CRACK FOUND IN 9LA UPPER FRAME STRUCTURE PN B535M2093202 NEAR BOTTOM RIVET ON RIGHT SIDE DURING INSPECTION OF TAIL BOOM AFTER REMOVAL OF HORIZONTAL STABILIZER. WAS ADVISED BY TECH REP TO ACCOMPLISH SERVICE BULLETIN 53-011 REQUIRING REPLACEMENT OF 9LA UPPER AND LOWER FRAMES TO PREVENT FUTURE CRACKS IN THIS AREA.