As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCOVERED WHEN FRAME WAS REMOVED TO REMOVE AND REPLACE RIVETS ON TAILBOOM ATTACH FITTING. (RIGHT UPPER FITTING) IT HAS BECOME GOOD PRACTICE TO CHECK THIS AREA BECAUSE OF PAST PROBLEMS. THE FRAME HAS BEEN FOUND TO CRACK IN THIS SAME AREA ON ALL AIRCRAFT THAT THIS INSPECTION IS DONE. FRAME WAS CRACKED ABOVE MATING SURFACE OF RIGHT UPPER T/B ATTACH FITTING. MAYBE RADIUS THE EDGES OF ATTACH FITTING THAT MATE WITH FRAME.