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 AC HAS 1627.3 HOURS TT. SERVICE REPORTS WAS DONE TO MFG SINCE 12-2000. IN 3 OCCASIONS THE MFG SENT THE EXHAUST PN 369D2860501 FOR REPLACEMENT, BUT IT DID NOT FIT INTO THE AIRCRAFT. IN THE MEANTIME, IT CONTINUED CRACKING AND WE CONTINUED TO REPAIR.