Bearfoil
The following is directly from the BEA Interim Report No2 -
The rudder is attached to the fin by means of eight hinge arms and one vertical load pick-up arm in the rudder’s hinge axis (arm 36 g). The rudder is controlled by means of a control unit (frames 84 and 85) and a mechanical control linkage (rods).
You will see that the arm is effectively two arms with a common intersection each side of the bush above the rudder bearing on the hinge arm. The fracture occurred on the bottom starboard side.
mm43