Sec. 25.487 - Rebound landing condition.
(a) The landing gear and its supporting
structure must be investigated for the loads occurring during rebound of
the airplane from the landing surface.
(b) With the landing gear fully extended
and not in contact with the ground, a load factor of 20.0 must act on the
unsprung weights of the landing gear. This load factor must act in the
direction of motion of the unsprung weights as they reach their limiting
positions in extending with relation to the sprung parts of the landing