As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS REMOVED FROM SERVICE DUE TO VIBRATION, DISASSEMBLY OF THE ENGINE REVEALED LPT GAS PATH DAMAGE. INVESTIGATION DETERMINED SEVEN OF THIRTY-SIX, 6TH TO 7TH STAGE DISK BOLTS HAD FAILED. PRELIMINARY ANALYSIS INDICATE THE BOLTS FAILED WITH THE CHARACTERISTICS OF A STRESS CORROSION MECHANISM.