Text in force at CS27-10: from CS27-10, effective 8 Feb 2023.
For the one-wheel landing condition, the rotorcraft is assumed to be in the level attitude and to contact the ground on one aft wheel. In this attitude:
(a) The vertical load must be the same as that obtained on that side under CS 27.479(b)(1); and
(b) The unbalanced external loads must be reacted by rotorcraft inertia.
ED Decision 2023/001/R · Source