§23.2160 Vibration, buffeting, and high-speed characteristics

(a) Vibration and buffeting, for operations up to VD/MD, must not interfere with the control of the aeroplane or cause excessive fatigue to the flight crew. Stall warning buffet within these limits is allowable. (b) For high-speed aeroplanes and all aeroplanes with a maximum operating altitude greater than 7 625 m (25 000 ft) pressure altitude, there must be no perceptible buffeting in cruise configuration at 1 g and at any speed up to VMO/MMO, except stall buffeting. (c) For high-speed aeroplanes, the applicant must determine the positive manoeuvring load factors at which the onset of perceptible buffet occurs in the cruise configuration within the operational envelope. Likely inadvertent excursions beyond this boundary must not result in structural damage. (d) High-speed aeroplanes must have recovery characteristics that do not result in structural damage or loss of control, beginning at any likely speed up to VMO/MMO, following: (1) an inadvertent speed increase; and (2) a high-speed trim upset for aeroplanes where dynamic pressure can impair the longitudinal trim system operation.