14 CFR · Part 25
14 CFR § 25.399
Dual control system.
(a)
Each dual control system must be designed for the pilots operating in opposition, using individual pilot forces not less than—
(1)
0.75 times those obtained under § 25.395; or
(2)
The minimum forces specified in § 25.397(c).
(b)
The control system must be designed for pilot forces applied in the same direction, using individual pilot forces not less than 0.75 times those obtained under § 25.395.
Regulations Referenced
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source