Regarding the inspection of a critically loaded stressed skin metal wing assembly, what indicates genuine rivet tipping?

In the context of inspecting a critically loaded stressed skin metal wing assembly, genuine rivet tipping is indicated by groups of consecutive rivet heads tipped in the same direction. This pattern suggests a systematic issue, such as a potential failure in structural integrity due to uneven load distribution or inadequate fastening. When rivet heads tilt uniformly, it typically points to areas experiencing excessive stress or deformation within the assembly, often reflecting a more significant concern that needs to be analyzed further.

On the other hand, single rivet heads tipping in different directions may not offer a clear indication of an overall structural problem, as they can occur due to individual inconsistencies rather than a widespread issue. No tipping of rivet heads at all would imply that the assembly is functioning correctly and remains under appropriate loading conditions, hence is not a sign of concern. Similarly, random tipping of rivet heads lacks the characteristic pattern needed to confirm genuine issues since it does not signify a coordinated response to stress on the structure. Therefore, the identification of groups of rivet heads tipped in the same direction serves as a critical alarm in the inspection process, warranting closer examination and corrective action if necessary.