As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE CHECKS WITH ENGINES RUNNING UP THE LT ENGINE HAD A STRONG STALL. THE LT ENGINE WAS IMMEDIATELY SWITCHED OFF. DURING THE PRELIMINARY BOROSCOPE INSPECTION, FOUND C6, C7, C13, COMBUSTION CHAMBER, T1 AND T2 IN GOOD CONDITIONS. THE DAMAGE WAS FOUND IN T4 AND HITS T3. THE INLET FAN FLANGE WAS FOUND SEPARATED. THE ENGINE TURNS WITHOUT DIFFICULTY THROUGH THE GEAR BOX AND THE FAN. THE ENGINE WILL BE SENT TO SHOP IN ORDER TO DETERMINE THE FAIL CAUSE.