§3.112 Requirements.

(a) The means used for trimming the airplane shall be such that, after being trimmed and without further pressure upon or movement of either the primary control or its corresponding trim control by the pilot or the automatic pilot, the airplane will maintain: (1) Lateral and directional trim in level flight at a speed of 0.9 Vh or at Vc, if lower, with the landing gear and wing flaps retracted: (2) Longitudinal trim under the following conditions: (i) During a climb with maximum continuous power at a speed between Vx and 1.4 Vs1, (a) With landing gear retracted and wing flaps retracted, (b) With landing gear retracted and wing flaps in the take-off position. (ii) During a glide with power off at a speed not in excess of 1.4 Vs1, (a) With landing gear extended and wing flaps retracted, (b) With landing gear extended and wing flaps extended under the forward center of gravity position approved with the maximum authorized weight. (c) With landing gear extended and wing flaps extended under the most forward center of gravity position approved, regardless of weight. (iii) During level flight at any speed from 0.9 Vh to Vx or 1.4 Vs1 with landing gear and wing flaps retracted. (b) In addition to the above, multiengine airplanes shall maintain longitudinal and directional trim at a speed between Vy and 1.4 Vs1 during climbing flight with the critical of two or more engines inoperative, with: (1) The other engine(s) operating at maximum continuous power. (2) The landing gear retracted, (3) Wing flaps retracted, (4) Bank not in excess of 5 degrees. STABILITY