It worked, thank you!
I started with 335 fuel and a couple of rocket pods, kept it at 130 IAS and reached 5,200m with 11% fuel left.
I had to keep reducing the collective a little bit each time the engine Set Lim orange lights came on in the overhead panel, and soon after reaching 5,200m the right hand engine spooled down and I started to lose height rapidly. It's not the first time that's happened to me. I think I had the de-icers on (engines and rotor blades) so I don't know what happened. The EKRAN indicated something about "Elec Accu" (because of loss of engine power to the electrical generator?).