As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A TURKISH AIRLINES, GE90-115B ESN 906917 IS ON A SHOP VISIT AT THE GE AVIATION SERVICES WALES SHOP. AT THE INCOMING INSPECTION PROCESS THE HPT INTERSTAGE SEAL HAS BEEN FOUND WITH A DENT TO THE FORWARD SEAL TOOTH AND A CIRCUMFERENTIAL CRACK ALONG THE EDGE OF THE DENT. THE PART IS AN LLP AND IS BEING RETIRED FROM SERVICE EARLY. THE ENGINE HAS HAD A PREVIOUS SHOP VISIT AT ANOTHER FACILITY. OEM CASE SUBMITTED FOR INVESTIGATION - # 01479571