CS 25.105 Take-off

(a)The take-off speeds prescribed by CS 25.107, the accelerate-stop distance prescribed by CS 25.109, the take-off path prescribed by CS 25.111, the take-off distance and take-off run prescribed by CS 25.113, and the net take-off flight path prescribed by CS 25.115, must be determined in the selected configuration for take-off at each weight, altitude, and ambient temperature within the operational limits selected by the applicant -

(1)In non-icing conditions; and

(2)In icing conditions, if in the configuration used to show compliance with CS 25.121(b), and with the most critical of the “Take-off Ice” accretion(s) defined in Appendices C and O, as applicable, in accordance with CS 25.21(g):

(i)The stall speed at maximum take-off weight exceeds that in non-icing conditions by more than the greater of 5.6 km/h (3 knots) CAS or 3% of VSR; or

(ii)The degradation of the gradient of climb determined in accordance with CS 25.121(b) is greater than one-half of the applicable actual-to-net take-off flight path gradient reduction defined in CS 25.115(b).

(b)No take-off made to determine the data required by this paragraph may require exceptional piloting skill or alertness.

(c)The take-off data must be based on:

(1)Smooth, dry and wet, hard-surfaced runways; and

(2)At the option of the applicant, grooved or porous friction course wet, hardsurfaced runways.

(d)The take-off data must include, within the established operational limits of the aeroplane, the following operational correction factors:

(1)Not more than 50% of nominal wind components along the take-off path opposite to the direction of take-off, and not less than 150% of nominal wind components along the take-off path in the direction of take-off.

(2)Effective runway gradients.

[Amdt 25/3]

[Amdt 25/16]