A support assembly may include a support structure and a P-clamp attached to the support structure. The P-clamp may include a clamp body defining an opening, a mounting base structured and arranged to engage the support structure, and a connecting section interconnecting the clamp body and the mounting base. The P-clamp may be arranged in an inverted upright position where the mounting base is attached to the support structure underneath the clamp body relative to a direction of gravity. The P-clamp may yield at the connecting section upon an application of a load for to the clamp body that is equal to or greater than a predetermined applied load three threshold. The support assembly may be useful in an aircraft fuel line installation for supporting a fuel line from the support structure.