As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EXHAUST STACK HAD TO BE REPAIRED SEVERAL TIMES SINCE 400.0 HOURS SINCE NEW. NOW THE HELICOPTER HAS 1568.2 HOURS TAT. IN 3 OCCASIONS THE MFG SENT THE EXHAUST PIN 369D2860-501 FOR REPLACEMENT BUT IT DID NOT FIT INTO THE HELICOPTER. IN MEAN TIME, PART CONTINUED CRACKING AND WE REPAIRING.