As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2491 AT TOP OF DESCENT, FLIGHT LEVEL 390 FT WITH INITIAL THROTTLE REDUCTION BY A THIRD, MOVED SLOW, LEFT ENGINE FLAME-OUT CAUTION MESSAGE FOR 14-15 SECONDS. NO ABNORMAL ENGINE INDICATIONS. REPLACED LEFT FADEC AS A PRECAUTIONARY MEASURE. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.