As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND THE LOWER RT COMPRESSOR STUD BROKEN OFF. DURING INSPECTION PROCESS FOR COMPRESSOR CASE HALVES. IT WAS NOTICED THAT THE RT LOWER COMPRESSOR STUD WAS MISSING (THAT IS THE NUT AND STUD WERE NOT VISABLE ON THE COMPRESSOR FLANGE). REPLACED UNIT. (K)