CS 27.1141 Powerplant controls: general
ED Decision 2003/15/RM
(a) Powerplant controls must be located and arranged under CS 27.777 and marked under CS 27.1555.
(b) Each flexible powerplant control must be approved.
(c) Each control must be able to maintain any set position without:
(1) Constant attention; or
(2) Tendency to creep due to control loads or vibration.
(d) Controls of powerplant valves required for safety 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 flight crew 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.
(e) For turbine-engine-powered rotorcraft, no single failure or malfunction, or probable combination thereof, in any powerplant control system may cause the failure of any powerplant function necessary for safety.
ED Decision 2003/15/RM
(a) There must be a separate power control for each engine.
(b) Power controls must be grouped and arranged to allow:
(1) Separate control of each engine; and
(2) Simultaneous control of all engines.
(c) Each power control must provide a positive and immediately responsive means of controlling its engine.
(d) If a power control incorporates a fuel shut-off feature, the control must have a means to prevent the inadvertent movement of the control into the shut-off position. The means must:
(1) Have a positive lock or stop at the idle position; and
(2) Require a separate and distinct operation to place the control in the shut-off position.
(e) For rotorcraft to be certificated for a 30-second OEI power rating, a means must be provided to automatically activate and control the 30-second OEI power and prevent any engine from exceeding the installed engine limits associated with the 30-second OEI power rating approved for the rotorcraft.
ED Decision 2003/15/RM
(a) There must be means to quickly shut off all ignition by the grouping of switches or by a master ignition control.
(b) Each group of ignition switches, except ignition switches for turbine engines for which continuous ignition is not required, and each master ignition control must have a means to prevent its inadvertent operation.
ED Decision 2003/15/RM
If there are mixture controls, each engine must have a separate control and the controls must be arranged to allow:
(a) Separate control of each engine; and
(b) Simultaneous control of all engines.
CS 27.1151 Rotor brake controls
ED Decision 2003/15/RM
(a) It must be impossible to apply the rotor brake inadvertently in flight.
(b) There must be means to warn the crew if the rotor brake has not been completely released before take-off.
CS 27.1163 Powerplant accessories
ED Decision 2003/15/RM
(a) Each engine-mounted accessory must:
(1) Be approved for mounting on the engine involved;
(2) Use the provisions on the engine for mounting; and
(3) Be sealed in such a way as to prevent contamination of the engine oil system and the accessory system.
(b) Unless other means are provided, torque limiting means must be provided for accessory drives located on any component of the transmission and rotor drive system to prevent damage to these components from excessive accessory load.