Eric Greenwell wrote in message

WHat aircraft was this, which bellcrank, and how was the helper exerting
pressure? Or was he simply holding the surface steady while the pilot
applied the pressure? What, exactly, broke (bellcrank, mounting of the
bellcrank, a bearing), and why did it fail?

I know of one case where an elevator push rod failed during a PCC
(Ventus) and another where an aileron circuit bell crank failed in
flight at the weld line. (G103Acro).


Andy