RF, Orig design from A109 and carried forward
- Input - helical pinion
- Planetary reduction - spur
- Mast drive from planetary carrier - splines
Coupling g'box - was spur meshing, then changed as 'product improvement' to helical. Made for a challenging O/H cost
My concern would particularly concentrate on what happened when the bearings go home with a lack of lube..........
VFR