All hinges can and do fail over time. However, the fact that there are several hinges in any given control surface makes it very improbable that catstrophic failure will occur. I did change out the smaller hinges in the flaps for ROBART hinge points because I did think the OEM hinges were too small. Keep in mind that the control surface hinges, i.e. ailerons, rudder, elevator have minimal pull force being applied to them. I would bet that other "gremlins" will cause the demise of our planes before these hinges do.

Happy Flying!

Loopman