AMC 25.1315 Negative accelerations

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

AMC 25.1315 Negative accelerations ED Decision 2003/2/RM 1 Demonstration of compliance with [CS 25.1315](#_DxCrossRefBm1709821168) should be made by analysis and/or ground tests, and should be supported by flight tests. 2 *Analysis and/or Ground Tests.* Appropriate analysis and/or ground tests should be made on components of essential fluid systems and such other components as are likely to be adversely affected by negative acceleration to demonstrate that they will not produce a hazardous malfunction. 3 *Flight Tests* 3.1 The aeroplane should be subjected to – a. One continuous period of at least five seconds at less than zero g, and, separately, b. A period containing at least two excursions to less than zero g in rapid succession, in which the total time at less than zero g is at least five seconds. 3.2 The tests should be made at the most critical condition from the fuel flow standpoint, e.g. with fuel flow corresponding to maximum continuous power and with the fuel representing a typical operational low fuel condition as for a missed approach.