Text in force at CS29-12: from CS29-0, effective 14 Nov 2003.
If there is a means to control the rotation of the rotor dri ve sy stem i ndependently of t he engine, any lim itations o n th e u se o f th at means must be specified, and the control for that m eans m ust be guarded to prevent inadvertent operation.
ED Decision 2003/016/RM · Source