U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 27Subpart B - Subpart B—Flight

GENERAL
§ 27.21 - Proof of compliance.
§ 27.25 - Weight limits.
§ 27.27 - Center of gravity limits.
§ 27.29 - Empty weight and corresponding center of gravity.
§ 27.31 - Removable ballast.
§ 27.33 - Main rotor speed and pitch limits.

PERFORMANCE
§ 27.45 - General.
§ 27.49 - Performance at minimum operating speed.
§ 27.51 - Takeoff.
§ 27.65 - Climb: all engines operating.
§ 27.67 - Climb: one engine inoperative.
§ 27.71 - Autorotation performance.
§ 27.75 - Landing.
§ 27.87 - Height-velocity envelope.

FLIGHT CHARACTERISTICS
§ 27.141 - General.
§ 27.143 - Controllability and maneuverability.
§ 27.151 - Flight controls.
§ 27.161 - Trim control.
§ 27.171 - Stability: general.
§ 27.173 - Static longitudinal stability.
§ 27.175 - Demonstration of static longitudinal stability.
§ 27.177 - Static directional stability.

GROUND AND WATER HANDLING CHARACTERISTICS
§ 27.231 - General.
§ 27.235 - Taxiing condition.
§ 27.239 - Spray characteristics.
§ 27.241 - Ground resonance.

MISCELLANEOUS FLIGHT REQUIREMENTS
§ 27.251 - Vibration.
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