From EC pilot training manual:
begin
MAIN ROTOR HUB integral with the rotor shaft supports the rotor components
ROTOR SHAFT driven by the MGB, supports the main rotor hub.
FLARED HOUSING : transmit the aerodynamic force from a rotating part
(rotor shaft) to a non-rotating part (fittings bolted on the fuselage) via 3 suspension bars.
The splined end of the rotor shaft engages in the MGB second stage planet gear cage
end
If the visible bar on the picture is a suspension bar, thus, this bar has gone loose from the fuselage while remaining attached on the flared housing that I presume is under the visible swashplate.