There are a couple of Air Crash Investigation shows with dual flameouts in turbine aircraft, I thought the one on Tuninter 1153 was pretty informative. It was an ATR-72 where they had an incorrect fuel load & gauges for the plane, and flamed out over water. It could have easily made land, but the pilots got all wound up in the restart attempt and forgot to clean it up. Dual flameouts are super rare in real life as well as aircraft certification, they do not test dual failure scenarios very often. It takes a crash to get a study going.