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FEDERAL · 14 CFR

Part 27 — Airworthiness Standards: Normal Category Rotorcraft

252 sections · Title 14: Aeronautics and Space

§ 27.1Applicability.
§ 27.2Special retroactive requirements.
§ 27.21Proof of compliance.
§ 27.25Weight limits.
§ 27.27Center of gravity limits.
§ 27.29Empty weight and corresponding center of gravity.
§ 27.31Removable ballast.
§ 27.33Main rotor speed and pitch limits.
§ 27.45General.
§ 27.49Performance at minimum operating speed.
§ 27.51Takeoff.
§ 27.65Climb: all engines operating.
§ 27.67Climb: one engine inoperative.
§ 27.71Autorotation performance.
§ 27.75Landing.
§ 27.87Height-velocity envelope.
§ 27.141General.
§ 27.143Controllability and maneuverability.
§ 27.151Flight controls.
§ 27.161Trim control.
§ 27.171Stability: general.
§ 27.173Static longitudinal stability.
§ 27.175Demonstration of static longitudinal stability.
§ 27.177Static directional stability.
§ 27.231General.
§ 27.235Taxiing condition.
§ 27.239Spray characteristics.
§ 27.241Ground resonance.
§ 27.251Vibration.
§ 27.301Loads.
§ 27.303Factor of safety.
§ 27.305Strength and deformation.
§ 27.307Proof of structure.
§ 27.309Design limitations.
§ 27.321General.
§ 27.337Limit maneuvering load factor.
§ 27.339Resultant limit maneuvering loads.
§ 27.341Gust loads.
§ 27.351Yawing conditions.
§ 27.361Engine torque.
§ 27.391General.
§ 27.395Control system.
§ 27.397Limit pilot forces and torques.
§ 27.399Dual control system.
§ 27.411Ground clearance: tail rotor guard.
§ 27.427Unsymmetrical loads.
§ 27.471General.
§ 27.473Ground loading conditions and assumptions.
§ 27.475Tires and shock absorbers.
§ 27.477Landing gear arrangement.
§ 27.479Level landing conditions.
§ 27.481Tail-down landing conditions.
§ 27.483One-wheel landing conditions.
§ 27.485Lateral drift landing conditions.
§ 27.493Braked roll conditions.
§ 27.497Ground loading conditions: landing gear with tail wheels.
§ 27.501Ground loading conditions: landing gear with skids.
§ 27.505Ski landing conditions.
§ 27.521Float landing conditions.
§ 27.547Main rotor structure.
§ 27.549Fuselage, landing gear, and rotor pylon structures.
§ 27.561General.
§ 27.562Emergency landing dynamic conditions.
§ 27.563Structural ditching provisions.
§ 27.571Fatigue evaluation of flight structure.
§ 27.573Damage Tolerance and Fatigue Evaluation of Composite Rotorcraft Structures.
§ 27.601Design.
§ 27.602Critical parts.
§ 27.603Materials.
§ 27.605Fabrication methods.
§ 27.607Fasteners.
§ 27.609Protection of structure.
§ 27.610Lightning and static electricity protection.
§ 27.611Inspection provisions.
§ 27.613Material strength properties and design values.
§ 27.619Special factors.
§ 27.621Casting factors.
§ 27.623Bearing factors.
§ 27.625Fitting factors.
§ 27.629Flutter.
§ 27.653Pressure venting and drainage of rotor blades.
§ 27.659Mass balance.
§ 27.661Rotor blade clearance.
§ 27.663Ground resonance prevention means.
§ 27.671General.
§ 27.672Stability augmentation, automatic, and power-operated systems.
§ 27.673Primary flight control.
§ 27.674Interconnected controls.
§ 27.675Stops.
§ 27.679Control system locks.
§ 27.681Limit load static tests.
§ 27.683Operation tests.
§ 27.685Control system details.
§ 27.687Spring devices.
§ 27.691Autorotation control mechanism.
§ 27.695Power boost and power-operated control system.
§ 27.723Shock absorption tests.
§ 27.725Limit drop test.
§ 27.727Reserve energy absorption drop test.
§ 27.729Retracting mechanism.
§ 27.731Wheels.
§ 27.733Tires.
§ 27.735Brakes.
§ 27.737Skis.
§ 27.751Main float buoyancy.
§ 27.753Main float design.
§ 27.755Hulls.
§ 27.771Pilot compartment.
§ 27.773Pilot compartment view.
§ 27.775Windshields and windows.
§ 27.777Cockpit controls.
§ 27.779Motion and effect of cockpit controls.
§ 27.783Doors.
§ 27.785Seats, berths, litters, safety belts, and harnesses.
§ 27.787Cargo and baggage compartments.
§ 27.801Ditching.
§ 27.805Flight crew emergency exits.
§ 27.807Emergency exits.
§ 27.831Ventilation.
§ 27.833Heaters.
§ 27.853Compartment interiors.
§ 27.855Cargo and baggage compartments.
§ 27.859Heating systems.
§ 27.861Fire protection of structure, controls, and other parts.
§ 27.863Flammable fluid fire protection.
§ 27.865External loads.
§ 27.871Leveling marks.
§ 27.873Ballast provisions.
§ 27.901Installation.
§ 27.903Engines.
§ 27.907Engine vibration.
§ 27.917Design.
§ 27.921Rotor brake.
§ 27.923Rotor drive system and control mechanism tests.
§ 27.927Additional tests.
§ 27.931Shafting critical speed.
§ 27.935Shafting joints.
§ 27.939Turbine engine operating characteristics.
§ 27.951General.
§ 27.952Fuel system crash resistance.
§ 27.953Fuel system independence.
§ 27.954Fuel system lightning protection.
§ 27.955Fuel flow.
§ 27.959Unusable fuel supply.
§ 27.961Fuel system hot weather operation.
§ 27.963Fuel tanks: general.
§ 27.965Fuel tank tests.
§ 27.967Fuel tank installation.
§ 27.969Fuel tank expansion space.
§ 27.971Fuel tank sump.
§ 27.973Fuel tank filler connection.
§ 27.975Fuel tank vents.
§ 27.977Fuel tank outlet.
§ 27.991Fuel pumps.
§ 27.993Fuel system lines and fittings.
§ 27.995Fuel valves.
§ 27.997Fuel strainer or filter.
§ 27.999Fuel system drains.
§ 27.1011Engines: General.
§ 27.1013Oil tanks.
§ 27.1015Oil tank tests.
§ 27.1017Oil lines and fittings.
§ 27.1019Oil strainer or filter.
§ 27.1021Oil system drains.
§ 27.1027Transmissions and gearboxes: General.
§ 27.1041General.
§ 27.1043Cooling tests.
§ 27.1045Cooling test procedures.
§ 27.1091Air induction.
§ 27.1093Induction system icing protection.
§ 27.1121General.
§ 27.1123Exhaust piping.
§ 27.1141Powerplant controls: general.
§ 27.1143Engine controls.
§ 27.1145Ignition switches.
§ 27.1147Mixture controls.
§ 27.1151Rotor brake controls.
§ 27.1163Powerplant accessories.
§ 27.1183Lines, fittings, and components.
§ 27.1185Flammable fluids.
§ 27.1187Ventilation and drainage.
§ 27.1189Shutoff means.
§ 27.1191Firewalls.
§ 27.1193Cowling and engine compartment covering.
§ 27.1194Other surfaces.
§ 27.1195Fire detector systems.
§ 27.1301Function and installation.
§ 27.1303Flight and navigation instruments.
§ 27.1305Powerplant instruments.
§ 27.1307Miscellaneous equipment.
§ 27.1309Equipment, systems, and installations.
§ 27.1316Electrical and electronic system lightning protection.
§ 27.1317High-intensity Radiated Fields (HIRF) Protection.
§ 27.1321Arrangement and visibility.
§ 27.1322Warning, caution, and advisory lights.
§ 27.1323Airspeed indicating system.
§ 27.1325Static pressure systems.
§ 27.1327Magnetic direction indicator.
§ 27.1329Automatic pilot and flight guidance system.
§ 27.1337Powerplant instruments.
§ 27.1351General.
§ 27.1353Energy storage systems.
§ 27.1357Circuit protective devices.
§ 27.1361Master switch.
§ 27.1365Electric cables.
§ 27.1367Switches.
§ 27.1381Instrument lights.
§ 27.1383Landing lights.
§ 27.1385Position light system installation.
§ 27.1387Position light system dihedral angles.
§ 27.1389Position light distribution and intensities.
§ 27.1391Minimum intensities in the horizontal plane of forward and rear position lights.
§ 27.1393Minimum intensities in any vertical plane of forward and rear position lights.
§ 27.1395Maximum intensities in overlapping beams of forward and rear position lights.
§ 27.1397Color specifications.
§ 27.1399Riding light.
§ 27.1401Anticollision light system.
§ 27.1411General.
§ 27.1413Safety belts.
§ 27.1415Ditching equipment.
§ 27.1419Ice protection.
§ 27.1435Hydraulic systems.
§ 27.1457Cockpit voice recorders.
§ 27.1459Flight data recorders.
§ 27.1461Equipment containing high energy rotors.
§ 27.1501General.
§ 27.1503Airspeed limitations: general.
§ 27.1505Never-exceed speed.
§ 27.1509Rotor speed.
§ 27.1519Weight and center of gravity.
§ 27.1521Powerplant limitations.
§ 27.1523Minimum flight crew.
§ 27.1525Kinds of operations.
§ 27.1527Maximum operating altitude.
§ 27.1529Instructions for Continued Airworthiness.
§ 27.1541General.
§ 27.1543Instrument markings: general.
§ 27.1545Airspeed indicator.
§ 27.1547Magnetic direction indicator.
§ 27.1549Powerplant instruments.
§ 27.1551Oil quantity indicator.
§ 27.1553Fuel quantity indicator.
§ 27.1555Control markings.
§ 27.1557Miscellaneous markings and placards.
§ 27.1559Limitations placard.
§ 27.1561Safety equipment.
§ 27.1565Tail rotor.
§ 27.1581General.
§ 27.1583Operating limitations.
§ 27.1585Operating procedures.
§ 27.1587Performance information.
§ 27.1589Loading information.