CS 25J1549 APU instruments

• ED Decision 2005/006/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

CS 25J1549 APU instruments ED Decision 2005/006/R For each APU instrument either a placard or colour markings or an acceptable combination must be provided to convey information on the maximum and (where applicable) minimum operating limits. Colour coding must comply with the following: (a) Each maximum and, if applicable, minimum safe operating limit must be marked with a red radial or a red line; (b) Each normal operating range must be marked with a green arc or green line, not extending beyond the maximum and minimum safe limits; (c) Each precautionary operating range must be marked with a yellow arc or a yellow line; and (d) Each APU speed range that is restricted because of excessive vibration stresses must be marked with red arcs or red lines. [Amdt 25/1]