Variable vane lever arm

A vane arm comprising:

• a first end and a second end;
• a shank extending between the first end and the second end and having a first face and a second face;
• a first hole in the shank proximate the first end;
• a second hole in the shank proximate the second end;
• a transverse groove in the first face and having:
• a base;
• a first open end and a second open end;
• a first side face and a second side face,
• wherein:
• at least one of the transverse groove first side face and second side face has a first facet at a first angle of 0° to 20° over at least 20% of a depth of the groove;
• at least one of the transverse groove first side face and second side face has a second facet at a second angle of 20° to 45° over at least 50% of the depth of the groove;
• and
• the side face having the first facet has a third facet, proximal to the first facet and a third angle of 20° to 45° over at least 20% of the depth of the groove.