As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH HORIZONTAL STABILIZER END CAP RIBS LT AND RT WERE FOUND CRACKED DURING ANNUAL INSPECTION. THIS RIB HAD BEEN MODIFIED UNDER STC SA456NW ON JAN 25-2000. TOTAL TIME ON PART IS 332 HOURS. AIRCRAFT HAS BEEN OPERATING UNDER NORMAL CONDITIONS.