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14 CFR · Part 33

Airworthiness Standards: Aircraft Engines

69 sections, read subpart by subpart. Every section keeps its own page and exact citation.

74 items · About 2.0 MB · Auto-updates · Removed when you log out
Start Reading: Subpart A

About Part 33

Each subpart, appendix and SFAR reads as one continuous document, with its sections in the contents. Copy an exact citation or open the official eCFR text from any section.

Reflects the eCFR edition of Sep 29, 2026.

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Units

10

Subparts

7 Units

Subpart A

General

§§ 33.1–33.8.

6 Sections

Subpart B

Design and Construction; General

§§ 33.11–33.29.

10 Sections

Subpart C

Design and Construction; Reciprocating Aircraft Engines

§§ 33.31–33.39.

6 Sections

Subpart D

Block Tests; Reciprocating Aircraft Engines

§§ 33.41–33.57.

10 Sections

Subpart E

Design and Construction; Turbine Aircraft Engines

§§ 33.61–33.79.

19 Sections

Subpart F

Block Tests; Turbine Aircraft Engines

§§ 33.81–33.99.

17 Sections

Subpart G

Special Requirements: Turbine Aircraft Engines

§ 33.201.

1 Section

Appendices

3 Units

Appendix A to Part 33

Instructions for Continued Airworthiness

Appendix A to Part 33.

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Appendix B to Part 33

Certification Standard Atmospheric Concentrations of Rain and Hail

Appendix B to Part 33.

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Appendix C to Part 33 [Reserved]

Appendix D to Part 33

Mixed Phase and Ice Crystal Icing Envelope (Deep Convective Clouds)

Appendix D to Part 33.

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