14 CFR · Part 23

14 CFR § 23.2245

Aeroelasticity.

(a)

The airplane must be free from flutter, control reversal, and divergence—

(1)

At all speeds within and sufficiently beyond the structural design envelope;

(2)

For any configuration and condition of operation;

(3)

Accounting for critical degrees of freedom; and

(4)

Accounting for any critical failures or malfunctions.

(b)

The applicant must establish tolerances for all quantities that affect flutter.

Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.

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