What was found
(CAN) THIS ENGINE WAS SENT FOR REPAIR AFTER A POWER TURBINE BLADE DISTRESS WAS REPORTED. IT WAS REPORTED THAT .THE RH ENGINE FAILED WITH A LOUD NOISE .THE POWER TURBINE HAD BEEN SHATTERED .THE COMPRESSOR SECTION HAD BEEN SEIZED . NO FURTHER DETAILS OF THE EVENT WERE REPORTED. HOT SECTION BORESCOPE PICTURES WERE SUPPLIED WITH UNUSUAL BLACK MATERIAL DISPERSED ALL OVER THE HOT SECTION, ESPECIALLY AT THE TIPS OF THE COMPRESSOR TURBINE BLADES. (TC# 20190725012)