When proceeding to the airport from Kathmandu (Nepal) in the mountains of Tibet, on board the Yak-40 belonging to the Ukrainian airline, there was a failure of navigation equipment. It was decided to land situated in the rate of Lukla airport, since lost over Tibet is very dangerous and not much fuel left. The airport runway is tilted up about 7-10 degrees, so there is a jet plane to land hard, we had to limit the maximum nose up before planting to touch the main stand and not to lose control.