U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 14Chapter IPart 27Subpart D - Subpart D—Design and Construction

GENERAL
§ 27.601 - Design.
§ 27.602 - Critical parts.
§ 27.603 - Materials.
§ 27.605 - Fabrication methods.
§ 27.607 - Fasteners.
§ 27.609 - Protection of structure.
§ 27.610 - Lightning and static electricity protection.
§ 27.611 - Inspection provisions.
§ 27.613 - Material strength properties and design values.
§ 27.619 - Special factors.
§ 27.621 - Casting factors.
§ 27.623 - Bearing factors.
§ 27.625 - Fitting factors.
§ 27.629 - Flutter.

ROTORS
§ 27.653 - Pressure venting and drainage of rotor blades.
§ 27.659 - Mass balance.
§ 27.661 - Rotor blade clearance.
§ 27.663 - Ground resonance prevention means.

CONTROL SYSTEMS
§ 27.671 - General.
§ 27.672 - Stability augmentation, automatic, and power-operated systems.
§ 27.673 - Primary flight control.
§ 27.674 - Interconnected controls.
§ 27.675 - Stops.
§ 27.679 - Control system locks.
§ 27.681 - Limit load static tests.
§ 27.683 - Operation tests.
§ 27.685 - Control system details.
§ 27.687 - Spring devices.
§ 27.691 - Autorotation control mechanism.
§ 27.695 - Power boost and power-operated control system.

LANDING GEAR
§ 27.723 - Shock absorption tests.
§ 27.725 - Limit drop test.
§ 27.727 - Reserve energy absorption drop test.
§ 27.729 - Retracting mechanism.
§ 27.731 - Wheels.
§ 27.733 - Tires.
§ 27.735 - Brakes.
§ 27.737 - Skis.

FLOATS AND HULLS
§ 27.751 - Main float buoyancy.
§ 27.753 - Main float design.
§ 27.755 - Hulls.

PERSONNEL AND CARGO ACCOMMODATIONS
§ 27.771 - Pilot compartment.
§ 27.773 - Pilot compartment view.
§ 27.775 - Windshields and windows.
§ 27.777 - Cockpit controls.
§ 27.779 - Motion and effect of cockpit controls.
§ 27.783 - Doors.
§ 27.785 - Seats, berths, litters, safety belts, and harnesses.
§ 27.787 - Cargo and baggage compartments.
§ 27.801 - Ditching.
§ 27.805 - Flight crew emergency exits.
§ 27.807 - Emergency exits.
§ 27.831 - Ventilation.
§ 27.833 - Heaters.

FIRE PROTECTION
§ 27.853 - Compartment interiors.
§ 27.855 - Cargo and baggage compartments.
§ 27.859 - Heating systems.
§ 27.861 - Fire protection of structure, controls, and other parts.
§ 27.863 - Flammable fluid fire protection.

EXTERNAL LOADS
§ 27.865 - External loads.

MISCELLANEOUS
§ 27.871 - Leveling marks.
§ 27.873 - Ballast provisions.
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