FYI... Here is a link to an Avweb article about possibly defective McFarlane aileron hinges. The article and service bulletin (McFarlane SB-10) have information on lot #'s and dates the hinges were sold.
https://www.avweb.com/aviation-news/rep ... mcfarlane/
https://www.mcfarlaneaviation.com/media ... -hinge.pdf
McFarlane Aileron Hinge Service Bulletin
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
McFarlane Aileron Hinge Service Bulletin
N1235D - 1951 170A - SN: 20118