# 14 C.F.R. § 27.1323 (2026): Airspeed indicating system

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1323

## Section

- **Citation:** 14 C.F.R. § 27.1323 (2026)
- **Heading:** Airspeed indicating system
- **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 F: Equipment / § 27.1323: § 27.1323   Airspeed indicating system.

## Text

(a) Each airspeed indicating instrument must be calibrated to indicate true airspeed (at sea level with a standard atmosphere) with a minimum practicable instrument calibration error when the corresponding pitot and static pressures are applied.
(b) The airspeed indicating system must be calibrated in flight at forward speeds of 20 knots and over.
(c) At each forward speed above 80 percent of the climbout speed, the airspeed indicator must indicate true airspeed, at sea level with a standard atmosphere, to within an allowable installation error of not more than the greater of—
(1) ±3 percent of the calibrated airspeed; or
(2) Five knots.
(Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act of 1958 (49 U.S.C. 1354(a), 1421, 1423, 1424, and 1425); and sec. 6(c) of the Dept. of Transportation Act (49 U.S.C. 1655(c)))
[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27-13, 42 FR 36972, July 18, 1977]

## Nearby sections

- [14 C.F.R. § 27.1301 (2026) § 27.1301   Function and installation.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1301.md)
- [14 C.F.R. § 27.1303 (2026) § 27.1303   Flight and navigation instruments.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1303.md)
- [14 C.F.R. § 27.1305 (2026) § 27.1305   Powerplant instruments.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1305.md)
- [14 C.F.R. § 27.1307 (2026) § 27.1307   Miscellaneous equipment.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1307.md)
- [14 C.F.R. § 27.1309 (2026) § 27.1309   Equipment, systems, and installations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1309.md)
- [14 C.F.R. § 27.1316 (2026) § 27.1316   Electrical and electronic system lightning protection.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1316.md)
- [14 C.F.R. § 27.1317 (2026) § 27.1317   High-intensity Radiated Fields (HIRF) Protection.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1317.md)
- [14 C.F.R. § 27.1321 (2026) § 27.1321   Arrangement and visibility.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1321.md)
- [14 C.F.R. § 27.1322 (2026) § 27.1322   Warning, caution, and advisory lights.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1322.md)
- [14 C.F.R. § 27.1323 (2026) § 27.1323   Airspeed indicating system.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1323.md)
- [14 C.F.R. § 27.1325 (2026) § 27.1325   Static pressure systems.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1325.md)
- [14 C.F.R. § 27.1327 (2026) § 27.1327   Magnetic direction indicator.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1327.md)
- [14 C.F.R. § 27.1329 (2026) § 27.1329   Automatic pilot and flight guidance system.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1329.md)
- [14 C.F.R. § 27.1337 (2026) § 27.1337   Powerplant instruments.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1337.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_1323. Check the current official text before relying on it. Not legal advice.