AMC1 CAT.POL.A.305 Take-off

• ED Decision 2021/005/R found in: Air Operations (965/2012) Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Feb 2025)

AMC1 CAT.POL.A.305 Take-off ED Decision 2021/005/R RUNWAY SURFACE CONDITION (a) Unless otherwise specified in the AFM or other performance or operating manuals from the manufacturer, the variables affecting the take-off performance and the associated factors that should be applied to the AFM data are shown in Table 1 below. They should be applied in addition to the operational factors as prescribed in [CAT.POL.A.305](#_DxCrossRefBm927678780). Table 1 Runway surface condition — Variables <table border="1" cellpadding="0" cellspacing="0" width="567"><tr><td valign="top" width="217"><p><b>Surface type</b></p></td><td valign="top" width="161"><p><b>Condition</b></p></td><td valign="top" width="189"><p><b>Factor</b></p></td></tr><tr><td valign="top" width="217"><p>Grass (on firm soil) up to 20 cm long</p></td><td valign="top" width="161"><p>Dry</p></td><td valign="top" width="189"><p>1.2</p></td></tr><tr><td valign="top" width="217"><p>up to 20 cm long</p></td><td valign="top" width="161"><p>Wet</p></td><td valign="top" width="189"><p>1.3</p></td></tr><tr><td valign="top" width="217"><p>Paved</p></td><td valign="top" width="161"><p>Wet</p></td><td valign="top" width="189"><p>1.0</p></td></tr></table> (b) The soil should be considered firm when there are wheel impressions but no rutting. (c) When taking off on grass with a single-engined aeroplane, care should be taken to assess the rate of acceleration and consequent distance increase. (d) When making a rejected take-off on very short grass that is wet and with a firm subsoil, the surface may be slippery, in which case the distances may increase significantly. (e) The determination of take-off performance data for wet and contaminated runways, when such data is available, should be based on the reported runway surface condition in terms of contaminant and depth. AMC1 CAT.POL.A.305 Take-off ED Decision 2021/005/R RUNWAY SURFACE CONDITION (a) Unless otherwise specified in the AFM or other performance or operating manuals from the manufacturer, the variables affecting the take-off performance and the associated factors that should be applied to the AFM data are shown in Table 1 below. They should be applied in addition to the operational factors as prescribed in [CAT.POL.A.305](#_DxCrossRefBm318086400). Table 1 Runway surface condition — Variables <table border="1" cellpadding="0" cellspacing="0" width="567"><tr><td valign="top" width="217"><p><b>Surface type</b></p></td><td valign="top" width="161"><p><b>Condition</b></p></td><td valign="top" width="189"><p><b>Factor</b></p></td></tr><tr><td valign="top" width="217"><p>Grass (on firm soil) up to 20 cm long</p></td><td valign="top" width="161"><p>Dry</p></td><td valign="top" width="189"><p>1.2</p></td></tr><tr><td valign="top" width="217"><p>up to 20 cm long</p></td><td valign="top" width="161"><p>Wet</p></td><td valign="top" width="189"><p>1.3</p></td></tr><tr><td valign="top" width="217"><p>Paved</p></td><td valign="top" width="161"><p>Wet</p></td><td valign="top" width="189"><p>1.0</p></td></tr></table> (b) The soil should be considered firm when there are wheel impressions but no rutting. (c) When taking off on grass with a single-engined aeroplane, care should be taken to assess the rate of acceleration and consequent distance increase. (d) When making a rejected take-off on very short grass that is wet and with a firm subsoil, the surface may be slippery, in which case the distances may increase significantly. (e) The determination of take-off performance data for wet and contaminated runways, when such data is available, should be based on the reported runway surface condition in terms of contaminant and depth. ##### AMC1 CAT.POL.A.305 Take-off *ED Decision 2021/005/R* **RUNWAY SURFACE CONDITION** (a) Unless otherwise specified in the AFM or other performance or operating manuals from the manufacturer, the variables affecting the take-off performance and the associated factors that should be applied to the AFM data are shown in Table 1 below. They should be applied in addition to the operational factors as prescribed in [CAT.POL.A.305](#_DxCrossRefBm523088336). ***Table 1*** Runway surface condition — Variables <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Surface type</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Condition</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Factor</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Grass (on firm soil) up to 20 cm long</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Dry</p> </td> <td bgcolor="#d9d9d9"><p align="left"> 1.2</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> up to 20 cm long</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Wet</p> </td> <td bgcolor="#d9d9d9"><p align="left"> 1.3</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Paved</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Wet</p> </td> <td bgcolor="#d9d9d9"><p align="left"> 1.0</p> </td> </tr> </table> (b) The soil should be considered firm when there are wheel impressions but no rutting. (c) When taking off on grass with a single-engined aeroplane, care should be taken to assess the rate of acceleration and consequent distance increase. (d) When making a rejected take-off on very short grass that is wet and with a firm subsoil, the surface may be slippery, in which case the distances may increase significantly. (e) The determination of take-off performance data for wet and contaminated runways, when such data is available, should be based on the reported runway surface condition in terms of contaminant and depth.