---
kind: "unit"
title: "14"
title_heading: "Aeronautics and Space"
key: "chI/subchC/part33"
level: "part"
label: "Part 33"
heading: "Airworthiness Standards: Aircraft Engines"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/14/chI-subchC-part33"
sections_count: 70
---

# Part 33 — Airworthiness Standards: Aircraft Engines

Title 14 C.F.R. — Aeronautics and Space › Chapter I — Federal Aviation Administration, Department of Transportation › Subchapter C — Aircraft

## Contents

- [Subpart A — General](/cfr/14/chI-subchC-part33-subpartA.md)
- [Subpart B — Design and Construction; General](/cfr/14/chI-subchC-part33-subpartB.md)
- [Subpart C — Design and Construction; Reciprocating Aircraft Engines](/cfr/14/chI-subchC-part33-subpartC.md)
- [Subpart D — Block Tests; Reciprocating Aircraft Engines](/cfr/14/chI-subchC-part33-subpartD.md)
- [Subpart E — Design and Construction; Turbine Aircraft Engines](/cfr/14/chI-subchC-part33-subpartE.md)
- [Subpart F — Block Tests; Turbine Aircraft Engines](/cfr/14/chI-subchC-part33-subpartF.md)
- [Subpart G — Special Requirements: Turbine Aircraft Engines](/cfr/14/chI-subchC-part33-subpartG.md)