Regional Jet 900 (CRJ900)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Troubleshooting; Situational Awareness
Aircraft Equipment Problem Less Severe
Aircraft Equipment Problem Dissipated; Flight Crew Landed in Emergency Condition; Flight Crew Overcame Equipment Problem
Aircraft
We were at 31000 feet and had briefed our arrival and had received our descend via clearance. About 3-5 minutes before top of descent; the Captain and I heard what sounded like a couple bangs from the rear of the aircraft. We did not know what caused it and all the systems were indicating normally. A minute or so later it happened again; this time followed by the left engine spooling down. N1; EGT and N2 spooled down followed by an L ENG FLAMEOUT caution. We identified the malfunction and the Captain called for the L ENG FLAMEOUT checklist. He was Pilot Flying and continued to fly the aircraft while I went through the checklist. At this point we were still dealing with the [problem] and making sure the aircraft was under control so we had not had time to call ATC or Dispatch. At most 1 to 2 minutes had elapsed. As we completed the checklist; the engine had gone through an automatic relight and came back on its own. We completed the checklist which instructed no further action was required. We elected to resume to [our destination] since both engines were working normally and we were already on the arrival sequence. We did not [advise ATC] because at that point we did not have one. We notified the flight attendants what happened and the current status and proceeded normally to an uneventful arrival approach and landing.Maintenance met us at the aircraft; the flameout was written up and the aircraft taken out of service. We do not know the reason for the flameout. I have no suggestions. Everyone in the crew remained calm; made timely and accurate decisions; followed our checklists and SOPs and the flight landed normally.
CRJ900 First Officer reported an engine flamedout then recovered while in cruise flight.