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Title 14

Displaying title 14, up to date as of 7/16/2026. Title 14 was last amended 7/06/2026.
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Title 14Aeronautics and SpacePart / Section
Chapter IFederal Aviation Administration, Department of Transportation1 – 199
Subchapter CAircraft21 – 59
Part 25Airworthiness Standards: Transport Category Airplanes25.1 – 25.1801
Subpart CStructure25.301 – 25.581
General25.301 – 25.307
§ 25.301Loads.
§ 25.302Interaction of systems and structures.
§ 25.303Factor of safety.
§ 25.305Strength and deformation.
§ 25.307Proof of structure.
Flight Loads25.321
§ 25.321General.
Flight Maneuver and Gust Conditions25.331 – 25.353
§ 25.331Symmetric maneuvering conditions.
§ 25.333Flight maneuvering envelope.
§ 25.335Design airspeeds.
§ 25.337Limit maneuvering load factors.
§ 25.341Gust and turbulence loads.
§ 25.343Design fuel and oil loads.
§ 25.345High lift devices.
§ 25.349Rolling conditions.
§ 25.351Yaw maneuver conditions.
§ 25.353Rudder control reversal conditions.
Supplementary Conditions25.361 – 25.373
§ 25.361Engine and auxiliary power unit torque.
§ 25.362Engine failure loads.
§ 25.363Side load on engine and auxiliary power unit mounts.
§ 25.365Pressurized compartment loads.
§ 25.367Unsymmetrical loads due to engine failure.
§ 25.371Gyroscopic loads.
§ 25.373Speed control devices.
Control Surface and System Loads25.391 – 25.459
§ 25.391Control surface loads: General.
§ 25.393Loads parallel to hinge line.
§ 25.395Control system.
§ 25.397Control system loads.
§ 25.399Dual control system.
§ 25.405Secondary control system.
§ 25.407Trim tab effects.
§ 25.409Tabs.
§ 25.415Ground gust conditions.
§ 25.427Unsymmetrical loads.
§ 25.445Auxiliary aerodynamic surfaces.
§ 25.457Wing flaps.
§ 25.459Special devices.
Ground Loads25.471 – 25.519
§ 25.471General.
§ 25.473Landing load conditions and assumptions.
§ 25.477Landing gear arrangement.
§ 25.479Level landing conditions.
§ 25.481Tail-down landing conditions.
§ 25.483One-gear landing conditions.
§ 25.485Side load conditions.
§ 25.487Rebound landing condition.
§ 25.489Ground handling conditions.
§ 25.491Taxi, takeoff and landing roll.
§ 25.493Braked roll conditions.
§ 25.495Turning.
§ 25.497Tail-wheel yawing.
§ 25.499Nose-wheel yaw and steering.
§ 25.503Pivoting.
§ 25.507Reversed braking.
§ 25.509Towing loads.
§ 25.511Ground load: unsymmetrical loads on multiple-wheel units.
§ 25.519Jacking and tie-down provisions.
Water Loads25.521 – 25.537
§ 25.521General.
§ 25.523Design weights and center of gravity positions.
§ 25.525Application of loads.
§ 25.527Hull and main float load factors.
§ 25.529Hull and main float landing conditions.
§ 25.531Hull and main float takeoff condition.
§ 25.533Hull and main float bottom pressures.
§ 25.535Auxiliary float loads.
§ 25.537Seawing loads.
Emergency Landing Conditions25.561 – 25.563
§ 25.561General.
§ 25.562Emergency landing dynamic conditions.
§ 25.563Structural ditching provisions.
Fatigue Evaluation25.571
§ 25.571Damage-tolerance and fatigue evaluation of structure.
Lightning Protection25.581
§ 25.581Lightning protection.