henra
Impact on the surface: Vertical speed : 150kts, horizontal speed: 50 - 100 kts. Pitch angle: 20 - 30°. Engines at high N1/EPR. (Does that match the pictures of the engine ?)
Given only the photos of the engine remains, it is impossible to tell if the engines were operating at high N1, there is nothing to go by at the moment. Usually one can tell this by visually observing the fan blades or compressor blades which would be bent in the opposite direction of rotation.
I am thinking the upward pitch angle would be less, more like 5°