CS 25.1141 Powerplant controls: general

(See AMC 25.1141) Each powerplant control must be located, arranged, and designed under CS 25.777 to 25.781 and marked under CS 25.1555. In addition, it must meet the following requirements:

(a)Each control must be located so that it cannot be inadvertently operated by persons entering, leaving, or moving normally in, the cockpit.

(b)Each flexible control must be approved or must be shown to be suitable for the particular application.

(c)Each control must have sufficient strength and rigidity to withstand operating loads without failure and without excessive deflection.

(d)Each control must be able to maintain any set position without constant attention by flight-crew members and without creep due to control loads or vibration.

(e)The portion of each powerplant control located in a designated fire zone that is required to be operated in the event of fire must be at least fire resistant. (See CS 25.903(c).)

(f)For Powerplant valve controls located in the flight deck there must be a means:

(1)for the flightcrew to select each intended position or function of the valve; and

(2)to indicate to the flightcrew:

(i)the selected position or function of the valve; and

(ii)when the valve has not responded as intended to the selected position or function. (See AMC 25.1141(f))

[Amdt 25/1]

[Amdt 25/18]