As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIVET HEAD MISSING ON EXTENSION FITTING OF VERTICAL STABILIZER FORWARD SPAR JUST ABOVE AREA WHERE SPAR IS BOLTED TO FUSELAGE BULKHEAD. THERE IS NO EVIDENCE OF CORROSION OR CRACKING OF STRUCTURE IMMEDIATELY SURROUNDING RIVET LOCATION. RIVET APPEARS TO HAVE FAILED IN TENSION. ADJACENT RIVETS APPEAR SOUND.