Propeller for a turbine engine of an aircraft with a variable-pitch vane and a geared counterweight device

An assembly for a propeller of a turbine engine of an aircraft, the assembly comprising:

• a variable-pitch vane having a blade connected to a root, the vane having a longitudinal axis coincident with a pitch axis of the vane which passes through the root;
• a base secured in rotation to the vane about the pitch axis and connected to a toothed wheel portion extending about the pitch axis;
• and
• a counterweight device having a shaft movable in rotation about a substantially concurrent axis perpendicular to the pitch axis, the shaft being connected to at least one weigh and to a pinion portion geared with the toothed wheel portion,
• wherein the toothed wheel portion is attached to the base by at least one shear bolt, and
• wherein the assembly further comprising at least one retention screw for retaining the toothed wheel portion on the base, the at least one retention screw being non-functional as long as the at least one shear bolt is unbroken and the at least one retention screw being functional when the at least one shear bolt is broken.