Description:(2) Not less than VMCL; and. (3) Not greater than VREF. CS 25.121. Climb: one-engine- inoperative. (See AMC 25.121). (a) Take-off; landing gear extended. (See AMC. 25.121(a).) In the critical take-off configuration existing along the flight path (between the points at which the aeroplane reaches VL