This happened in 2016 off the coast of the Greece near the city of Tehssaloniki. It is reported that the Apache helicopter suffered engine failure. What do you think?

Both pilots survived according to a Greek news site named Zougla.

The crash is reported to have place during the SARISA-2016 military exercise – a large-scale exercise under the co-ordination of the 1st Army, involving units and three branches of the Armed Forces and U.S. Special Forces Division.

The helicopter is believed to belong to the Greek military. – Mirror

Apache_helicopter_slams_nose-down_into_sea_during_exercise_in_Greece

Featured image from video screen capture