Posts by user "aerobat77" [Posts: 9 Total up-votes: 0 Pages: 1]

Question is why both engines lost power . Foreign object ingestion , contaminated fuel or both cutoff levels operated ? We do not know .

Any autothrust discussion is misleading since every pilot in that situation will firewall the levers whatever thrust reduction was selected for TO . the same is true for the RAT discussion- if enough hydraulic pressure was generated or not . The plane pitched up last second so there obviously was control until the end . Of course , without energy pulling alone will not bring you anywhere .

Why did both engines fail the same second as they would be cut off ???

Murphy . Maybe this was the first aircraft to receive fuel from a faulty storage tank . After that the airport was closed and nobody departed on this fuel ...

Most other here discussed scenarios are nonsense , e.g the system would simply ignore a cutoff command with thrust levers above idle .

sorry if it was not clear : when you move the switches to cutoff and the thrust levers are above idle imho the engines would NOT cutoff , the command would be ignored .

you follow the shutdown procedures , one of the first items is to retard the power lever to idle . With levers in idle they will shutdown , above idle they will not .

I operated such guarded pull-move switches on several plane types uncounted times and not a single time in my entire pilot career i had a situation that such a switch "sits" on top of the locking gate and suddenly snaps by itself .
It is either positivly on or off .

In theory i could with much fantasy imagine dirt around the locking gate that keeps it pulled where you believe its latched but imaging that both switches were sitting on top of the gate and snapped back at the very moment of rotation is too much fantasy for me .

Further , even with a non working locking gate such a switch would never move by accleration forces of the plane alone , it needs positive manual input .

their position roughly behind the thrust levers does not offer any space to store there lets say your phone which slips down and moves them .

one more point : during the very moment of rotation there is normally not a single reason to change anything in the vicinity of the center console at all to explain why you even had your hands there .

We can be sure this switches and their locking mechanism were carefully inspected in the wreckage .

since there is no grounding of the 787 fleet i think nobody considers the switches were defective but it seems to be clear for the investigators they were pulled and switched to cutoff by pilot action .

The investigation probably now concentrates by whom of them both and to find out if it was a catastrophic operation error in a mental blackout or a concious , deliberate action .

It can be said that in private talks between pilot colleques there is a clear opinion what the true reason for this tragic crash was , but due to the magnitude of this event such talks are held non public .

Following this logic you will never know . The FDR can only record what switch was moved to what position but it cannot say what true intentions the pilot had by doing this .

when you see both engines quitting right after takeoff you might be a bit shocked and perplexed . You also will struggle to imagine its your colleque who just switched both off .