Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Inflight Shutdown; General Declared Emergency
Aircraft; Weather
During cruise at FL410; the First Officer noted high oil temperature on the left engine. The crew then noted zero oil quantity on same engine. High Oil Temperature Checklist was performed. During procedure; oil temperature continued to increase and entered the red band; so the engine was shut down in accordance with the checklist and all indications returned to normal including oil quantity. The decision was made to [divert] as [another airport] was closer than [our destination] and the crew was familiar with airport and level of support available. Also; [our planned destination] had high winds at the surface which were not conducive to safe operation (280/27G39); mountainous terrain and high altitude above sea level.
During the initial stage of cruise flight; I noticed the left engine temperature in the yellow band. I pointed this out to the Captain; who then looked up the proper procedure in the QRH. As we were going through the checklist in the QRH; the engine temperature moved into the red band. Per checklist instructions we secured the left engine using the Engine Failure/Shutdown Checklist. We then notified ATC; declared an emergency and began the drift-down procedure. During the descent the Captain made contact with the company and we determined the best course of action was to divert. We then coordinated with ATC for direct routing. Upon arrival we landed without further incident.
During cruise the crew observed an increased oil temperture on the left engine as well as a low oil quantity. After performing the appropriate checklist; they shutdown the engine and divert to a suitable airport.