AMC 25.143(d) Controllability and Manoeuvrability

• ED Decision 2007/010/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.143(d) Controllability and Manoeuvrability ED Decision 2007/010/R 1 The maximum forces given in the table in [CS 25.143(c)](#_DxCrossRefBm1709820670) for pitch and roll control for short term application are applicable to manoeuvres in which the control force is only needed for a short period. Where the manoeuvre is such that the pilot will need to use one hand to operate other controls (such as the landing flare or go-around, or during changes of configuration or power resulting in a change of control force that must be trimmed out) the single-handed maximum control forces will be applicable. In other cases (such as take-off rotation, or manoeuvring during en-route flight) the two handed maximum forces will apply. 2 Short term and long term forces should be interpreted as follows:– Short term forces are the initial stabilised control forces that result from maintaining the intended flight path during configuration changes and normal transitions from one flight condition to another, or from regaining control following a failure. It is assumed that the pilot will take immediate action to reduce or eliminate such forces by re-trimming or changing configuration or flight conditions, and consequently short term forces are not considered to exist for any significant duration. They do not include transient force peaks that may occur during the configuration change, change of flight condition or recovery of control following a failure. Long term forces are those control forces that result from normal or failure conditions that cannot readily be trimmed out or eliminated. [Amdt 25/3]