Whether procedure is to use both throttles together or not, these guys didn’t actually “secure the engine”. It was just sitting there at idle power. We can probably all agree that if we were gonna go in the water that we would probably try every engine we had available to us to prevent that from happening.
im sure a multitude of factors contributed (night, fatigue, communication issues, training, maintenance, etc.), but I just can’t comprehend that they didn’t try and use the idled engine. Granted we are all pretty much Monday morning quarterbacking this thing.