CS 25.1521 Powerplant limitations

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

CS 25.1521 Powerplant limitations ED Decision 2015/008/R (See [AMC 25.1521](#_DxCrossRefBm1709821778)) (a) *General.* The powerplant limitations prescribed in this paragraph must be established so that they do not exceed the corresponding limits for which the engines or propellers are type certificated and do not exceed the values on which compliance with any other requirement of this Code is based. (b) Reserved. (c) *Turbine engine installations*. Operating limitations relating to the following must be established for turbine engine installations: (1) Horsepower, torque or thrust, rpm, gas temperature, and time for – (i) Maximum continuous power or thrust (relating to augmented or unaugmented operation as applicable). (ii) Take-off power or thrust (relating to augmented or unaugmented operation as applicable). (2) Fuel designation or specification. (3) Maximum time interval between engine run-ups from idle, run-up power setting, duration at power, and the associated minimum ambient temperature, if any, demonstrated for the maximum time interval, for ground operation in icing conditions, as defined in [CS 25.1093(b)(2)](#_DxCrossRefBm1709821509). (4) Any other parameter for which a limitation has been established as part of the engine type certificate except that a limitation need not be established for a parameter that cannot be exceeded during normal operation due to the design of the installation or to another established limitation. (d) *Ambient temperature.* An ambient temperature limitation (including limitations for winterisation installations, if applicable) must be established as the maximum ambient atmospheric temperature established in accordance with [CS 25.1043(b)](#_DxCrossRefBm1709821500). [Amdt 25/16]