ANTI ICING ALL ON EXCEPT CONTINUOUS IGNITION. ACFT ACQUIRED ICE AT 11000. ON DSCNT ICE AROUND L ENG INLET ENTERED AIR SCOOP. ENG FLAMED OUT. WAS RESTARTED AT 7000 FT.

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WE HAD ENCOUNTERED MODERATE ICING CONDITIONS AT 11000 FT. ALL ICING PROTECTION WAS ON PRIOR TO ENTERING THE ICING CONDITIONS WITH THE EXCEPTION OF CONTINUOUS IGNITION. PROP DEICE; WINDSHIELD HEAT; PITOT HEAT; AND ENG INLET HEAT ALL SEEMED TO FUNCTION PROPERLY. THE CAPT NOTICED AN ACCUMULATION OF ICE ON THE L ENG INLET. UPON DSCNT; AND SUBSEQUENT LEVEL OFF AT 7000 FT THE #1 (L) ENG FLAMED OUT. WE CONFIRMED THE ENG FAILURE AND INITIATED THE ENG FAILURE PROC. WE THEN INITIATED THE ENG RESTART PROC. WE SUCCESSFULLY RESTARTED THE #1 ENG WITHIN 45 SECONDS OF CONFIRMING THE ENG FAILURE. NO ALT WAS LOST AND WE CONTINUED A NORMAL FLT AND MADE A NORMAL LNDG AT ANCHORAGE. I BELIEVE OUR DSCNT TO 7000 FT LOOSENED THE ICE BUILDUP ON THE #1 ENG INLET. ENOUGH ICE MAY HAVE BEEN INGESTED INTO THE INLET TO CAUSE THE ENG TO FLAME OUT. SINCE CONTINUOUS IGNITION WAS NOT ON AT THE TIME OF ENG FAILURE; THERE WAS NO SOURCE OF IGNITION TO SUSTAIN THE FLAME DURING THE APPARENT ICE INGESTION. A FLAMEOUT COULD HAVE BEEN AVOIDED HAD THE CONTINUOUS IGNITION BEEN ON. A SUBSEQUENT CHK OF ALL ICE PROTECTION SYS; INCLUDING THE ENG INLET HEAT; SHOWED ALL FUNCTIONING PROPERLY.