As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT WAS IN THE PROCESS OF A DAILY PREFLIGHT, DURING THE PREFLIGHT THE PILOT FOUND A CRACK ON THE TAILBOOM. THE CRACK WAS VALIDATED, IT IS 118.6250" AFT FROM THE TAILBOOM TO AIRFRAME ATTACHMENT BULKHEAD. THE LENGTH OF THE CRACK IS 1.6250". IT ORIIGINATES UNDER AN OVERLAPPED PIECE OF THE TAILBOOM SKIN FROM AN ATTACHING RIVET.