Quazz As I stated this is due to loss of hydraulics, blue and green systems are fed from same tank. I was explaining that single engine taxi isnot an issue as long as your Np is generating ACW on one side, PROVIDED no leaks or fluid loss! The fact the emergency or parking brake accumulator did not seem available indicates complete hydraulic fluid loss, as indicated by the long wet trail down the center line! Engine mountings are fine btw! New prop yes, reduction gearbox....... mmmmmm As for the last post by "non iron" how does your statement help anyone????? Do u know the full circumstances?