Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 493
Aircraft Equipment Problem Critical
Air Traffic Control Issued New Clearance; Flight Crew Diverted; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition
Aircraft
At FL400 we encountered a left engine failure accompanied with slight vibration and an over temp of 900 plus degrees. We asked for an immediate descent; and started a right turn. We ran the Engine Fire/Severe Damage/Separation Checklist and the engine was shut down. EGT eventually reduced and no fire indications were present. Last I remember seeing was N1 rotation around 24 percent. It was decided that ZZZ was the closest suitable airport to divert to. I flew the aircraft while the Captain coordinated with Flight Attendants; Dispatch and informed the Passengers. We had good CRM which helped us stay in the Yellow/Green and maintain good situational awareness. We ran all pertinent checklists in QRH. I flew the aircraft near ZZZ and Captain took over and performed an uneventful single-engine landing. Fire Rescue met us; checked us over; and cleared us to taxi to gate. Brake cooling was checked with no issues.
I had confusion [regarding the] proper assessment of engine condition based on my training. Autothrottles disconnected initially indicating an engine malfunction. Next was a rise in EGT prompting the QRH and initially retarding the throttle and requesting a lower altitude. No Engine Fire warning was present and a quick test of Fire Warning System proved all was functional. Engine Failure and Shutdown Checklist was accomplished. We now were indicating adequate N1 and N2 rotation; acceptable EGT; and a Crossbleed indication drawing me to a restart situation. My assessment was that was a bad idea considering such a high EGT indication on our initial problem.
B737 flight crew reported that the left engine was shut down due to an overtemp and vibration. The flight diverted to the nearest suitable field.