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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 14 - Aeronautics and Space |
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Chapter I - Federal Aviation Administration, Department of Transportation |
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SubChapter C - Aircraft |
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Part 25 - Airworthiness Standards: Transport Category Airplanes |
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Subpart G - Operating Limitations and Information |
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Markings and Placards |
§ 25.1549 - Powerplant and auxiliary power unit instruments.
Latest version.
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§ 25.1549 Powerplant and auxiliary power unit instruments.
For each required powerplant and auxiliary power unit instrument, as appropriate to the type of instrument -
(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 takeoff and precautionary range must be marked with a yellow arc or a yellow line; and
(d) Each engine, auxiliary power unit, or propeller speed range that is restricted because of excessive vibration stresses must be marked with red arcs or red lines.
[Amdt. 25-40, 42 FR 15044, Mar. 17, 1977]