As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION OF COMPRESSOR CORE IT WAS NOTED THAT ONE 5TH STAGE BLADE TAB LOCK WAS MISSING AND THAT BLADE HAD MOVED AFT IN THE DISK MAKING CONTACT WITH THE FORWARD FACE OF THE 5TH STAGE STATOR. A PORTION OF THE MISSING TAB LOCK WAS LATER FOUND AFT IN THE DIFFUSER SECTION. THE TAB LOCK IS A PMA PART, INVESTIGATING UNDER THERE PMA PROCESS.