What was found
EWR - FLT 0177 - THE NR 3 ENGINE AUTO SHUT-DOWN DURING CLIMB-OUT OF EWR. THE SHUT-DOWN WAS ACCOMPANIED BY A LOUD BANG AND VIBRATION. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. THE NR 3 ENGINE WAS REMOVED AND REPLACED. THE SDR WILL REMAIN OPEN FOR PART INFORMATION PENDING INVESTIGATION. SUPPLEMENT - SHOP FINDINGS REVEALED THE FAILURE OF TWO FIRST STAGE TURBINE BLADES AT THE AIRFOIL AREA. THE FAILED BLADES SUFFERED FROM INTERNAL METAL DEFICIENCY. (X)