As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUBMITTER STATED THEY HAVE ENCOUNTERED MULTIPLE EXHAUST STACK FAILURES ON FLEET OF KATANA DA-20-C1. THE SEPARATION OCCURRING AT THE EXHAUST PORT ATTACH FLANGE. AT THIS POINT, FLEET HAS BEEN GROUNDED UNTIL ALL STACKS HAVE BEEN INSPECTED AND A CAUSE HAS BEEN DETERMINED. TOTAL TIME ON AFFECTED PARTS IS LESS THAN 200 HOURS.