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Code · CFR · Title 14 — Aeronautics and Space · Part 25 — Airworthiness Standards: Transport Category Airplanes · § 25.939

§ 25.939. Turbine engine operating characteristics.

92 words·~1 min read·/us/cfr/t14/s§ 25.939·

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(a)Turbine engine operating characteristics must be investigated in flight to determine that no adverse characteristics (such as stall, surge, or flameout) are present, to a hazardous degree, during normal and emergency operation within the range of operating limitations of the airplane and of the engine.
(b)[Reserved]
(c)The turbine engine air inlet system may not, as a result of air flow distortion during normal operation, cause vibration harmful to the engine. [Amdt. 25-11, 32 FR 6912, May 5, 1967, as amended by Amdt. 25-40, 42 FR 15043, Mar. 17, 1977]
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§ 25.939
Turbine engine operating characteristics.
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