Text in force at CS29-12: from CS29-0, effective 14 Nov 2003.
(a) Powerplant controls must be located and arranged under C S 29.777 and marked under CS 29.1555.
(b) Each control m ust be located so that it cannot be inadvertently operat ed by persons entering, leaving or m oving norm ally i n t he cockpit.
(c) Each flexible powerplant control must be approved.
(d) Each control must be able to maintain any set position without:
(1) Constant attention; or
(2) Tendency to creep due t o cont rol loads or vibration.
(e) Each control m ust b e ab le to with stand operating loads without excessive deflection.
(f) Controls of powerpl ant 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 m oving b etween th e fu lly open and fully closed position.
ED Decision 2003/016/RM · Source