14 CFR Part 27 — Airworthiness Standards: Normal Category Rotorcraft
Subpart A — General
Subpart B — Flight
- § 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.
- § 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.
- § 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.
- § 27.231— General.
- § 27.235— Taxiing condition.
- § 27.239— Spray characteristics.
- § 27.241— Ground resonance.
- § 27.251— Vibration.
Subpart C — Strength Requirements
- § 27.301— Loads.
- § 27.303— Factor of safety.
- § 27.305— Strength and deformation.
- § 27.307— Proof of structure.
- § 27.309— Design limitations.
- § 27.321— General.
- § 27.337— Limit maneuvering load factor.
- § 27.339— Resultant limit maneuvering loads.
- § 27.341— Gust loads.
- § 27.351— Yawing conditions.
- § 27.361— Engine torque.
- § 27.391— General.
- § 27.395— Control system.
- § 27.397— Limit pilot forces and torques.
- § 27.399— Dual control system.
- § 27.411— Ground clearance: tail rotor guard.
- § 27.427— Unsymmetrical loads.
- § 27.471— General.
- § 27.473— Ground loading conditions and assumptions.
- § 27.475— Tires and shock absorbers.
- § 27.477— Landing gear arrangement.
- § 27.479— Level landing conditions.
- § 27.481— Tail-down landing conditions.
- § 27.483— One-wheel landing conditions.
- § 27.485— Lateral drift landing conditions.
- § 27.493— Braked roll conditions.
- § 27.497— Ground loading conditions: landing gear with tail wheels.
- § 27.501— Ground loading conditions: landing gear with skids.
- § 27.505— Ski landing conditions.
- § 27.521— Float landing conditions.
- § 27.547— Main rotor structure.
- § 27.549— Fuselage, landing gear, and rotor pylon structures.
- § 27.561— General.
- § 27.562— Emergency landing dynamic conditions.
- § 27.563— Structural ditching provisions.
- § 27.571— Fatigue evaluation of flight structure.
- § 27.573— Damage Tolerance and Fatigue Evaluation of Composite Rotorcraft Structures.
Subpart D — Design and Construction
- § 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.
- § 27.653— Pressure venting and drainage of rotor blades.
- § 27.659— Mass balance.
- § 27.661— Rotor blade clearance.
- § 27.663— Ground resonance prevention means.
- § 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.
- § 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.
- § 27.751— Main float buoyancy.
- § 27.753— Main float design.
- § 27.755— Hulls.
- § 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.
- § 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.
- § 27.865— External loads.
- § 27.871— Leveling marks.
- § 27.873— Ballast provisions.
Subpart E — Powerplant
- § 27.901— Installation.
- § 27.903— Engines.
- § 27.907— Engine vibration.
- § 27.917— Design.
- § 27.921— Rotor brake.
- § 27.923— Rotor drive system and control mechanism tests.
- § 27.927— Additional tests.
- § 27.931— Shafting critical speed.
- § 27.935— Shafting joints.
- § 27.939— Turbine engine operating characteristics.
- § 27.951— General.
- § 27.952— Fuel system crash resistance.
- § 27.953— Fuel system independence.
- § 27.954— Fuel system lightning protection.
- § 27.955— Fuel flow.
- § 27.959— Unusable fuel supply.
- § 27.961— Fuel system hot weather operation.
- § 27.963— Fuel tanks: general.
- § 27.965— Fuel tank tests.
- § 27.967— Fuel tank installation.
- § 27.969— Fuel tank expansion space.
- § 27.971— Fuel tank sump.
- § 27.973— Fuel tank filler connection.
- § 27.975— Fuel tank vents.
- § 27.977— Fuel tank outlet.
- § 27.991— Fuel pumps.
- § 27.993— Fuel system lines and fittings.
- § 27.995— Fuel valves.
- § 27.997— Fuel strainer or filter.
- § 27.999— Fuel system drains.
- § 27.1011— Engines: General.
- § 27.1013— Oil tanks.
- § 27.1015— Oil tank tests.
- § 27.1017— Oil lines and fittings.
- § 27.1019— Oil strainer or filter.
- § 27.1021— Oil system drains.
- § 27.1027— Transmissions and gearboxes: General.
- § 27.1041— General.
- § 27.1043— Cooling tests.
- § 27.1045— Cooling test procedures.
- § 27.1091— Air induction.
- § 27.1093— Induction system icing protection.
- § 27.1121— General.
- § 27.1123— Exhaust piping.
- § 27.1141— Powerplant controls: general.
- § 27.1143— Engine controls.
- § 27.1145— Ignition switches.
- § 27.1147— Mixture controls.
- § 27.1151— Rotor brake controls.
- § 27.1163— Powerplant accessories.
- § 27.1183— Lines, fittings, and components.
- § 27.1185— Flammable fluids.
- § 27.1187— Ventilation and drainage.
- § 27.1189— Shutoff means.
- § 27.1191— Firewalls.
- § 27.1193— Cowling and engine compartment covering.
- § 27.1194— Other surfaces.
- § 27.1195— Fire detector systems.
Subpart F — Equipment
- § 27.1301— Function and installation.
- § 27.1303— Flight and navigation instruments.
- § 27.1305— Powerplant instruments.
- § 27.1307— Miscellaneous equipment.
- § 27.1309— Equipment, systems, and installations.
- § 27.1316— Electrical and electronic system lightning protection.
- § 27.1317— High-intensity Radiated Fields (HIRF) Protection.
- § 27.1321— Arrangement and visibility.
- § 27.1322— Warning, caution, and advisory lights.
- § 27.1323— Airspeed indicating system.
- § 27.1325— Static pressure systems.
- § 27.1327— Magnetic direction indicator.
- § 27.1329— Automatic pilot and flight guidance system.
- § 27.1337— Powerplant instruments.
- § 27.1351— General.
- § 27.1353— Energy storage systems.
- § 27.1357— Circuit protective devices.
- § 27.1361— Master switch.
- § 27.1365— Electric cables.
- § 27.1367— Switches.
- § 27.1381— Instrument lights.
- § 27.1383— Landing lights.
- § 27.1385— Position light system installation.
- § 27.1387— Position light system dihedral angles.
- § 27.1389— Position light distribution and intensities.
- § 27.1391— Minimum intensities in the horizontal plane of forward and rear position lights.
- § 27.1393— Minimum intensities in any vertical plane of forward and rear position lights.
- § 27.1395— Maximum intensities in overlapping beams of forward and rear position lights.
- § 27.1397— Color specifications.
- § 27.1399— Riding light.
- § 27.1401— Anticollision light system.
- § 27.1411— General.
- § 27.1413— Safety belts.
- § 27.1415— Ditching equipment.
- § 27.1419— Ice protection.
- § 27.1435— Hydraulic systems.
- § 27.1457— Cockpit voice recorders.
- § 27.1459— Flight data recorders.
- § 27.1461— Equipment containing high energy rotors.
Subpart G — Operating Limitations and Information
- § 27.1501— General.
- § 27.1503— Airspeed limitations: general.
- § 27.1505— Never-exceed speed.
- § 27.1509— Rotor speed.
- § 27.1519— Weight and center of gravity.
- § 27.1521— Powerplant limitations.
- § 27.1523— Minimum flight crew.
- § 27.1525— Kinds of operations.
- § 27.1527— Maximum operating altitude.
- § 27.1529— Instructions for Continued Airworthiness.
- § 27.1541— General.
- § 27.1543— Instrument markings: general.
- § 27.1545— Airspeed indicator.
- § 27.1547— Magnetic direction indicator.
- § 27.1549— Powerplant instruments.
- § 27.1551— Oil quantity indicator.
- § 27.1553— Fuel quantity indicator.
- § 27.1555— Control markings.
- § 27.1557— Miscellaneous markings and placards.
- § 27.1559— Limitations placard.
- § 27.1561— Safety equipment.
- § 27.1565— Tail rotor.
- § 27.1581— General.
- § 27.1583— Operating limitations.
- § 27.1585— Operating procedures.
- § 27.1587— Performance information.
- § 27.1589— Loading information.