After installation of prop assy on the prop shaft, the propeller turn in opposite direction.
1) Magnetics plugs checks on Gearbox but they are perfect, no traces of metal particles.
2) To be sure, we had fushed the gearbox : after this operation, the prop brake works by manual action.
3) On the other hand during the runnup, the prop brake no longer works.
4) The magnetic plugs are still correct.
Why did the prop brake work after flushing ?
But no longer work after ?
What is the cause or problem with the brake ?
Thank u in advance for your answer...