Narrative:

We were flying back home part 91 after delivering a patient. I was the pilot flying this leg. We were more than half way home at FL430 and were asked to climb to FL450 due to other traffic. At the time; the temperature was isa -5 and cruising at mach .77 when asked to climb to FL450. We told center we could make the climb so began to start a slow climb to FL450 at 500 ft a minute. I added power and trimmed the airplane to a climbing position and everything was normal and ok climbing at mach .75. Once reaching FL441; the airspeed began to drop down to mach .71 and pointed out to the captain the loss of airspeed and was advised to trim nose down to build up airspeed. Shortly after trimming nose down; we had a flame out on the right engine and began our recovery. We talked to center and shared with them the challenge we had and requested to descend to FL240 due to a flame out in the right engine. After given approval by center to start our descent; we asked to have vectors to perform a safe descent without disturbing any traffic flow. Center was very helpful in making sure that we safely stayed out of the way of any other aircraft during the descent. We had the checklist out during the descent and were setting up for an engine restart once getting to the optimal altitude which was successful. After engine restart; we were able to fly home at FL270 safely with both engines running and no conflict with any other traffic along the way. All procedures that were performed after the flameout were approved by the center and safely performed by the captain and myself using the checklist. This report is being submitted to let anyone that should be aware of the situation and hopefully help someone else flying the same type of aircraft.

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Original NASA ASRS Text

Title: A LR25 climbing through FL440 had an engine flame out but during the emergency descent to FL240 the engine was restarted so the flight continued to its scheduled destination.

Narrative: We were flying back home part 91 after delivering a patient. I was the pilot flying this leg. We were more than half way home at FL430 and were asked to climb to FL450 due to other traffic. At the time; the temperature was ISA -5 and cruising at MACH .77 when asked to climb to FL450. We told Center we could make the climb so began to start a slow climb to FL450 at 500 FT a minute. I added power and trimmed the airplane to a climbing position and everything was normal and OK climbing at MACH .75. Once reaching FL441; the airspeed began to drop down to MACH .71 and pointed out to the Captain the loss of airspeed and was advised to trim nose down to build up airspeed. Shortly after trimming nose down; we had a flame out on the right engine and began our recovery. We talked to Center and shared with them the challenge we had and requested to descend to FL240 due to a flame out in the right engine. After given approval by Center to start our descent; we asked to have vectors to perform a safe descent without disturbing any traffic flow. Center was very helpful in making sure that we safely stayed out of the way of any other aircraft during the descent. We had the checklist out during the descent and were setting up for an engine restart once getting to the optimal altitude which was successful. After engine restart; we were able to fly home at FL270 safely with both engines running and no conflict with any other traffic along the way. All procedures that were performed after the flameout were approved by the Center and safely performed by the Captain and myself using the checklist. This report is being submitted to let anyone that should be aware of the situation and hopefully help someone else flying the same type of aircraft.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.