Sec. 25.503 - Pivoting.
(a) The airplane is assumed to pivot
about one side of the main gear with the brakes on that side locked. The
limit vertical load factor must be 1.0 and the coefficient of friction
0.8.
(b) The airplane is assumed to be in
static equilibrium, with the loads being applied at the ground contact
points, in accordance with figure 8 of appendix A.