As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN PERFORMING A SCHEDULED FUEL NOZZLE REPLACEMENT, A TECH NOTICED WITH THE BORESCOPE A PART OF THE INNER LINER OF THE EXHAUST DUCT PROTRUDING. THE POWER SECTION WAS THEN REMOVED FROM THE GAS GENERATOR AND FURTHER DAMAGE WAS NOTED.