# 14 C.F.R. § 33.21 (2026): Engine cooling

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_21

## Section

- **Citation:** 14 C.F.R. § 33.21 (2026)
- **Heading:** Engine cooling
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 33: AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES / Subpart B: Design and Construction › General / § 33.21: § 33.21   Engine cooling.

## Text

Engine design and construction must provide the necessary cooling under conditions in which the airplane is expected to operate.

## Nearby sections

- [14 C.F.R. § 33.11 (2026) § 33.11   Applicability.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_11.md)
- [14 C.F.R. § 33.15 (2026) § 33.15   Materials.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_15.md)
- [14 C.F.R. § 33.17 (2026) § 33.17   Fire protection.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_17.md)
- [14 C.F.R. § 33.19 (2026) § 33.19   Durability.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_19.md)
- [14 C.F.R. § 33.21 (2026) § 33.21   Engine cooling.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_21.md)
- [14 C.F.R. § 33.23 (2026) § 33.23   Engine mounting attachments and structure.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_23.md)
- [14 C.F.R. § 33.25 (2026) § 33.25   Accessory attachments.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_25.md)
- [14 C.F.R. § 33.27 (2026) § 33.27   Turbine, compressor, fan, and turbosupercharger rotor overspeed.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_27.md)
- [14 C.F.R. § 33.28 (2026) § 33.28   Engine control systems.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_28.md)
- [14 C.F.R. § 33.29 (2026) § 33.29   Instrument connection.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_29.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P33_S33_21. Check the current official text before relying on it. Not legal advice.