As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE AMBER CAUTION MESSAGE ILLUMINATED INDICATING THE TAILCONE WAS NOT SECURE. MAINTENANCE FOUND THE INTERNAL TAILCONE RELEASE HANDLE PIN DISLODGED FROM THE RETAINER CLIPS. THE LOCK CABLE WAS REINSERTED AND THE BALL END NOW MAKES PROPER CONTACT WITH THE SWITCH AS REQUIRED. THE REQUIRED INSPECTION OF THE INSTALLATION WAS COMPLETED AND THE ACFT WAS RETURNED TO SERVICE.