(A) No aircraft engine shall be started on an aircraft not equipped with adequate brakes which are fully set, unless the wheels have been set with blocks that are equipped with ropes or other suitable means for removing them.
(B) No aircraft engine shall be started or run unless a competent operator shall be at the controls of the aircraft.
(C) No aircraft engine shall be run or warmed up unless the aircraft is in such position that the propeller blast shall clear all buildings, groups of people in the observation areas, and the flight path of landing aircraft.
(D) No aircraft engine shall be started in or run within 100 feet of a hangar or other building.
(Prior Code, § 8-56)