Originally Posted by
WideScreen
The circlip seems to have a "sharp" and a "non-sharp" edge,
It does and is a result the stamping manufacture process. Common AN/NAS steel washers have the same feature. Supposedly the weight pin retainer plate is stamped also. One theory is the sharp side of the clip and the sharp side of the retainer plate may cause interference and prevent complete seating of the clip. However the clip ear dimension check should have caught that, if it was checked.
Mount it the other way around, and it'll probably get some slack,
The groove dimension is spec to the clip thickness. Either way there should be no play unless not seated. Plus theres a note that the retainer plate should not have any play at the pin. Perhaps when the SB is released it will provide more on the reason.