Don't freak out yet.... The volume of oil in these is so small that it might be hard to see. The experts will let you know for sure but I do not have much time with the 951's but on the 787 the oil slowly disapates into the engine over time so that is why you have to add oil as part of the scheduled maintenance, the 951 could be the same. Let's hope that you caught it in time and can just add oil. Does yours have a drain plug that you can check to see if any comes out? If it were mine I would just add the recomended oil and ride it. More than likely you are fine because if the gears were starved from oil it would have eaten itself already. Bring in the 951 experts...