As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)DURING BOROSCOPE INSPECTION OF THE COMPRESSOR TURBINE VANE RING FOUND WHAT APPEARED TO BE A CRACK OF THE RING. UPON REMOVAL OF THE TURBINE WHEEL THE RING WAS FOUND SERVICEABLE, BUT FURTHER INSPECTION FOUND A DIFFUSER PIPE WELD AT THE DUCT TO BE CRACKED. THE CRACK EXTENDED 90 PERCENT OF THE WELD. THE DIFFUSER PIPE REMAINS TIGHT IN THE DUCT ASSEMBLY DIFFUSER EXIT.