# 14 C.F.R. § 27.303 (2026): Factor of safety

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_303

## Section

- **Citation:** 14 C.F.R. § 27.303 (2026)
- **Heading:** Factor of safety
- **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 27: AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT / Subpart C: Strength Requirements / § 27.303: § 27.303   Factor of safety.

## Text

Unless otherwise provided, a factor of safety of 1.5 must be used. This factor applies to external and inertia loads unless its application to the resulting internal stresses is more conservative.

## Nearby sections

- [14 C.F.R. § 27.301 (2026) § 27.301   Loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_301.md)
- [14 C.F.R. § 27.303 (2026) § 27.303   Factor of safety.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_303.md)
- [14 C.F.R. § 27.305 (2026) § 27.305   Strength and deformation.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_305.md)
- [14 C.F.R. § 27.307 (2026) § 27.307   Proof of structure.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_307.md)
- [14 C.F.R. § 27.309 (2026) § 27.309   Design limitations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_309.md)
- [14 C.F.R. § 27.321 (2026) § 27.321   General.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_321.md)
- [14 C.F.R. § 27.337 (2026) § 27.337   Limit maneuvering load factor.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_337.md)
- [14 C.F.R. § 27.339 (2026) § 27.339   Resultant limit maneuvering loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_339.md)
- [14 C.F.R. § 27.341 (2026) § 27.341   Gust loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_341.md)
- [14 C.F.R. § 27.351 (2026) § 27.351   Yawing conditions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_351.md)
- [14 C.F.R. § 27.361 (2026) § 27.361   Engine torque.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_361.md)
- [14 C.F.R. § 27.391 (2026) § 27.391   General.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_391.md)
- [14 C.F.R. § 27.395 (2026) § 27.395   Control system.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_395.md)
- [14 C.F.R. § 27.397 (2026) § 27.397   Limit pilot forces and torques.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_397.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_303. Check the current official text before relying on it. Not legal advice.