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  5. § 33.73
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14 CFR · Part 33

14 CFR § 33.73

Power or thrust response.

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Read in Subpart E
Part 33 Contents
  • Subpart A: General
  • Subpart B: Design and Construction; General
  • Subpart C: Design and Construction; Reciprocating Aircraft Engines
  • Subpart D: Block Tests; Reciprocating Aircraft Engines
  • Subpart E: Design and Construction; Turbine Aircraft Engines
  • Subpart F: Block Tests; Turbine Aircraft Engines
  • Subpart G: Special Requirements: Turbine Aircraft Engines
  • Appendix A to Part 33: Instructions for Continued Airworthiness
  • Appendix B to Part 33: Certification Standard Atmospheric Concentrations of Rain and Hail
  • Appendix D to Part 33: Mixed Phase and Ice Crystal Icing Envelope (Deep Convective Clouds)

The design and construction of the engine must enable an increase—

(a)

From minimum to rated takeoff power or thrust with the maximum bleed air and power extraction to be permitted in an aircraft, without overtemperature, surge, stall, or other detrimental factors occurring to the engine whenever the power control lever is moved from the minimum to the maximum position in not more than 1 second, except that the Administrator may allow additional time increments for different regimes of control operation requiring control scheduling; and

(b)

From the fixed minimum flight idle power lever position when provided, or if not provided, from not more than 15 percent of the rated takeoff power or thrust available to 95 percent rated takeoff power or thrust in not over 5 seconds. The 5-second power or thrust response must occur from a stabilized static condition using only the bleed air and accessories loads necessary to run the engine. This takeoff rating is specified by the applicant and need not include thrust augmentation.

Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.

Primary Source

  • Official Source (14 CFR · Part 33)