GroundRules
14 CFR 25.405: Secondary control system.
Where this section sits in the code
- Title 14—Aeronautics and Space
- CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
- SUBCHAPTER C—AIRCRAFT
- PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
- Subpart C—Structure
Secondary controls, such as wheel brake, spoiler, and tab controls, must be designed for the maximum forces that a pilot is likely to apply to those controls. The following values may be used:
Pilot Control Force Limits (Secondary Controls)
Control Limit pilot forces
Miscellaneous:
*Crank, wheel, or lever ((1 + R) / 3) × 50 lbs., but not less than 50 lbs. nor more than 150 lbs. (R = radius). (Applicable to any angle within 20° of plane of control).
Twist 133 in.-lbs.
Push-pull To be chosen by applicant.
*Limited to flap, tab, stabilizer, spoiler, and landing gear operation controls.
Collected 2026-08-27T02:24:20Z. Source file · JSON