AMC 25.1533(a)(3) Take-off distances on runways with a grooved or porous friction course surface

• ED Decision 2003/2/RM found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.1533(a)(3) Take-off distances on runways with a grooved or porous friction course surface ED Decision 2003/2/RM Runways that have a grooved or porous friction course (PFC) surface can maintain a significantly higher wheel-braking coefficient of friction when wet than can runways that lack such surface treatments. Where take-off distance information specifically applicable to such runways has been established, this higher level of friction has been taken into account in accordance with [CS 25.109(d)](#_DxCrossRefBm1709820677). It is therefore essential that such information is only approved for use on runways having a grooved or PFC surface that has been constructed and maintained to acceptable standards. FAA AC 150/532012B ‘Measurement, Construction and Maintenance of Skid-Resistant Airport Paving Surfaces’ provides guidance on such standards. Where such operational approval has not been obtained, the performance information applicable to a smooth, hard-surfaced runway must be used.