§ 135.147. Dual controls required.
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/us/cfr/t14/s§ 135.147·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
No person may operate an aircraft in operations requiring two pilots unless it is equipped with functioning dual controls. However, if the aircraft type certification operating limitations do not require two pilots, a throwover control wheel may be used in place of two control wheels.