Text in force at CAR3-14: from CAR3-0, effective 1 Nov 1949. OCR text
(a) The motion of flaps on opposite sides of the plane of symmetry shall be synchronized by a mechanical interconnection, unless the airplane is demonstrated to have safe flight characteristics while the flaps are retracted on one side and extended on the other.
(b) Where an interconnection is used, in the case of multiengine airplanes, it shall be designed to account for the unsymmetrical loads resulting from flight with the engines on one side of the plane of symmetry inoperative and the remaining engines at take-off power. For single engine airplanes, it may be assumed that 100 percent of the critical air load acts on one side and 70 percent on the other.