ED Decision 2003/18/RM
(a) Each control must be able to maintain any necessary position without -
(1) Constant attention by the pilot; or
(2) Tendency to creep due to control loads or vibration.
(b) Each control must be able to withstand operating loads without failure or excessive deflection.
(c) The portion of each powerplant control located in the engine compartment that is required to be operated in the event of fire must be at least fire resistant.
(d) Powerplant valve controls located in the cockpit must have -
(1) For manual valves, positive stops or in the case of fuel valves suitable index provisions, in the open and closed position; and
(2) For power-assisted valves, a means to indicate to the pilot when the valve -
(i) Is in the fully open or fully closed position; or
(ii) Is moving between the fully open and fully closed position.
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