Originally Posted by
apereira
They way I use the spanner wrench.
Hold the engine with one hand on the propeller shaft put the spanner parallel to the shaft and tighten the nut, try to use one hand to push the spanner and pull the shaft at the same time until you can't move it, this way I never got it to get loose. Also this method do not put any stress on the airframe, so even if you use a lot of force you won't break anything.
Regards
Alejandro
Hi Alejandro,
With the engine in the plane, I support under the prop shaft and tap the spanner with a small hammer. It seems to get plenty tight enough, so can't explain why it comes loose.