Pre-flight anyone?
I recall years ago a guy with an ultralight where the lower bolt had come out and the fairing was holding the strut on the bracket. He noticed that it wasn't flying straight any more and started adjusting the aileron to suit, more and more, until one day with an instructor on board the strut let go even further. A spiralled descent and mild crash landing followed with no injury to all. The lower bolt had long since fallen out.