Citationjet (C525/C526) - CJ I / II / III / IV
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed As Precaution; Flight Crew Landed in Emergency Condition; Flight Crew Inflight Shutdown
Aircraft
We were in cruise flight at FL430 and cleared to descend to FL 250 with 'good rate [of descent] to 250.' I (PF) selected 2500 fpm vertical descent and reduced power to maintain normal cruise speed. At approximately FL320 we had a master caution illuminate along with the right gen fail light. Almost immediately this was followed by the master warning light and the low oil pressure light; then fuel flow and hydraulic flow lights for the right engine. We determined that the right engine had failed for unknown reasons. After verifying normal operation of the left engine I called for the engine failure/precautionary shutdown checklist. The FO (First Officer) PM (Pilot Monitoring) and I ran the checklist without incident. With the engine secured we contacted ATC and let them know we would be diverting to ZZZ for the longer runway and asked for [fire trucks] to be standing by. We then determined that the engine was still showing N2 rotation from the airflow and I elected to try an emergency restart. The FO and I ran the Emergency Restart-One Engine checklist and had a successful start. We notified ATC that we had restarted the engine but would still be landing at ZZZ as a precaution. We briefed the passengers and let them know of the change in destination. The subsequent descent; approach; landing; taxi; and shutdown were without incident.
In the decent approximately 32K feet we received a caws light indication of a right gen off then quickly followed with R engine oil pressure. We pulled the QRS and began the checklist for engine failure precautionary shutdown. Completed the checklist; note that we still had N1 with no indications of damage or fire. Contacted ATC and made them aware of the situation. We then began the engine restart checklist after defending to FL200 and slowing to below 200Kts. Successful restart. Diverted to ZZZ for longer runway options and fire trucks as precautions for possible repeat engine failure. Approach and landing successful with no further issues. Sent passengers home via UBER as per their request.
CE-525 flight crew reported an engine loss during descent. The flight crew restarted the engine and diverted.