CS 25.105 Take-off

• ED Decision 2015/008/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

CS 25.105 Take-off ED Decision 2015/008/R (a) The take-off speeds prescribed by [CS 25.107](#_DxCrossRefBm1709820678), the accelerate-stop distance prescribed by [CS 25.109](#_DxCrossRefBm1709820677), the take-off path prescribed by [CS 25.111](#_DxCrossRefBm1709820676), the take-off distance and take-off run prescribed by [CS 25.113](#_DxCrossRefBm1709820675), and the net take-off flight path prescribed by [CS 25.115](#_DxCrossRefBm1709820674), 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)](#_DxCrossRefBm1709820672), 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)](#_DxCrossRefBm1709820660): (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]