Flight Crew reported a loud bang on take off and noticed #3 engine had high EGT. The flight crew then performed an in flight shut down of the #3 Engine; and made an air turn back and precautionary landing at departure airport.
Synopsis
Flight Crew reported a loud bang on take off and noticed #3 engine had high EGT. The flight crew then performed an in flight shut down of the #3 Engine; and made an air turn back and precautionary landing at departure airport.
Narrative
Flying Pilot on Aircraft X. Passing 11;000 ft. I asked the Captain (PM (Pilot Monitoring)) for Auto-flight. At approximately 14;000 ft.; I heard and felt a loud 'bang'; immediately after the aircraft started to Vibrate. The Captain stated; 'what was that that?' followed by 'Severe Engine Damage'. I asked the Captain if he would like to take command of the aircraft (sim habit) and he stated; 'yes; I can do that'. I looked over at the Engine Parameters to see if the N1 had seized or the Oil Quantity was 0 but due to aircraft vibration I wasn't able to focus long enough on a parameter to see any abnormality. The only thing I saw was the EGT at 664 degrees.I stated 'Compressor Stall' then the Captain said 'look at that EGT; Memory Items; Severe Engine Damage'. We both went through the recall item; I referenced the Quick Reference Checklist afterward and then I continued with the QRH. The Captain during this time was flying the aircraft and [requesting priority handling]. The QRH guides you to shut the engine down and pull the Engine Fire Handle down. However; before I discharged the Agent I asked the Captain; 'you sure you want me to discharge the bottle?'; to which he replied 'yes'.After the checklist was complete; we did the Approach Checklist and then I took over radio communications. We went through the motions of an air return and asked the Approach Controller for radar vectors for Runway XX (the longest runway available; given the wind direction). Landing was normal. We stopped on the runway and Fire Rescue went through their procedures. They stated 'no visible damage to engine; fuselage or tail section'. We shut the engines down on the Runway and were towed into the ramp. After arriving at the ramp. The Mechanic inspected the engine and noticed 'metal shavings' scattered all over the base of the Exhaust Nozzle. He stated; 'something inside the engine had failed'.
Second reporter narrative
Passing 14;000 ft. heard a very loud bang and felt the aircraft shutter with moderate vibration. The number 3 engine EGT immediately went to the red line. I believe 684 degrees C. The FO (First Officer) was the Pilot Flying initially and then I took control of the aircraft. I had him bring the engine throttle to idle and the EGT did not move and we still had vibrations so I Called for the Engine Fire/Severe damage checklist (even though we had N1). Vibration was still present but not as pronounced as before. I [requested priority handling] and notified the company via the divert message. I had the FO load the approach and run the landing data. We then received a level 2 Stab out of trim alert. We were in the descent so I disconnected the AP; trimmed the aircraft and reengaged the AP. No further issues with that. I decided to slow the airplane down and see if it trimmed and it worked fine. On landing I noticed that the rudder pedals were very stiff and hard to move. When stopped I asked the FO if he had his feet on the pedals and he said no. I had the aircraft checked on the runway by fire and rescue and they said all appears to be good. I elected to get towed to parking. After arriving at the ramp. The Mechanic inspected the engine and noticed 'metal shavings' scattered all over the base of the Exhaust Nozzle.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.