Question

what is the secret behind the malaysian plane which was sinked into the water....?

Answer 1

The missing flight MH370 may have been taken over “remotely” in a bid to foil a hijack, reviving one of the many conspiracy theories surrounding its disappearance. 

Answer 2

Dear... When the Plane was flying above the Indian Ocean. It lost its navigation signals with the satellite Therefore It Crashed and Gone into the depth of the Indian Ocean....

This Was the Case... Hope it helped you out :-D
Thanks ⭐(^^)⭐