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14 CFR · Part 25

Airworthiness Standards: Transport Category Airplanes

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

422 items · About 11 MB · Auto-updates · Removed when you log out
Start Reading: Subpart A

About Part 25

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

25

SFARs

2 Units

Special Federal Aviation Regulation No. 13

Special Federal Aviation Regulation No. 13

Special Federal Aviation Regulation No. 13.

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Special Federal Aviation Regulation No. 109

Special Federal Aviation Regulation No. 109

Special Federal Aviation Regulation No. 109.

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Subparts

9 Units

Subpart A

General

§§ 25.1–25.5.

5 Sections

Subpart B

Flight

§§ 25.21–25.255.

41 Sections

Subpart C

Structure

§§ 25.301–25.581.

69 Sections

Subpart D

Design and Construction

§§ 25.601–25.899.

86 Sections

Subpart E

Powerplant

§§ 25.901–25.1207.

90 Sections

Subpart F

Equipment

§§ 25.1301–25.1461.

62 Sections

Subpart G

Operating Limitations and Information

§§ 25.1501–25.1587.

34 Sections

Subpart H

Electrical Wiring Interconnection Systems (EWIS)

§§ 25.1701–25.1733.

17 Sections

Subpart I

Special Federal Aviation Regulations

§ 25.1801.

1 Section

Appendices

14 Units

Appendix A to Part 25

Appendix A to Part 25

Appendix A to Part 25.

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Appendix B to Part 25

Appendix B to Part 25

Appendix B to Part 25.

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Appendix C to Part 25

Appendix C to Part 25

Appendix C to Part 25.

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Appendix D to Part 25

Appendix D to Part 25

Appendix D to Part 25.

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Appendix E to Part 25

Appendix E to Part 25

Appendix E to Part 25.

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Appendix F to Part 25

Appendix F to Part 25

Appendix F to Part 25.

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Appendix H to Part 25

Instructions for Continued Airworthiness

Appendix H to Part 25.

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Appendix I to Part 25

Installation of an Automatic Takeoff Thrust Control System (ATTCS)

Appendix I to Part 25.

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Appendix J to Part 25

Emergency Evacuation

Appendix J to Part 25.

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Appendix K to Part 25

Extended Operations (ETOPS)

Appendix K to Part 25.

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Appendix L to Part 25

HIRF Environments and Equipment HIRF Test Levels

Appendix L to Part 25.

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Appendix M to Part 25

Fuel Tank System Flammability Reduction Means

Appendix M to Part 25.

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Appendix N to Part 25

Fuel Tank Flammability Exposure and Reliability Analysis

Appendix N to Part 25.

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Appendix O to Part 25

Supercooled Large Drop Icing Conditions

Appendix O to Part 25.

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