CFR /  Title 14  /  Part 27: Airworthiness Standards: Normal Category Rotorcraft

Section No.	Description
Section 27.1	Special retroactive requirements
Section 27.2	Proof of compliance
Section 27.21	Weight limits
Section 27.25	Center of gravity limits
Section 27.27	Empty weight and corresponding center of gravity
Section 27.29	Removable ballast
Section 27.31	Main rotor speed and pitch limits
Section 27.33	General
Section 27.45	Performance at minimum operating speed
Section 27.49	Takeoff
Section 27.51	Climb: all engines operating
Section 27.65	Climb: one engine inoperative
Section 27.67	Autorotation performance
Section 27.71	Landing
Section 27.75	Height-speed envelope
Section 27.87	General
Section 27.141	Controllability and maneuverability
Section 27.143	Flight controls
Section 27.151	Trim control
Section 27.161	Stability: general
Section 27.171	Static longitudinal stability
Section 27.173	Demonstration of static longitudinal stability
Section 27.175	Static directional stability
Section 27.177	General
Section 27.231	Taxiing condition
Section 27.235	Spray characteristics
Section 27.239	Ground resonance
Section 27.241	Vibration
Section 27.251	Loads
Section 27.301	Factor of safety
Section 27.303	Strength and deformation
Section 27.305	Proof of structure
Section 27.307	Design limitations
Section 27.309	General
Section 27.321	Limit maneuvering load factor
Section 27.337	Resultant limit maneuvering loads
Section 27.339	Gust loads
Section 27.341	Yawing conditions
Section 27.351	Engine torque
Section 27.361	General
Section 27.391	Control system
Section 27.395	Limit pilot forces and torques
Section 27.397	Dual control system
Section 27.399	Ground clearance: tail rotor guard
Section 27.411	Unsymmetrical loads
Section 27.427	General
Section 27.471	Ground loading conditions and assumptions
Section 27.473	Tires and shock absorbers
Section 27.475	Landing gear arrangement
Section 27.477	Level landing conditions
Section 27.479	Tail-down landing conditions
Section 27.481	One-wheel landing conditions
Section 27.483	Lateral drift landing conditions
Section 27.485	Braked roll conditions
Section 27.493	Ground loading conditions: landing gear with tail wheels
Section 27.497	Ground loading conditions: landing gear with skids
Section 27.501	Ski landing conditions
Section 27.505	Float landing conditions
Section 27.521	Main rotor structure
Section 27.547	Fuselage, landing gear, and rotor pylon structures
Section 27.549	General
Section 27.561	Emergency landing dynamic conditions
Section 27.562	Structural ditching provisions
Section 27.563	Fatigue evaluation of flight structure
Section 27.571	Damage Tolerance and Fatigue Evaluation of Composite Rotorcraft Structures
Section 27.573	Design
Section 27.601	Critical parts
Section 27.602	Materials
Section 27.603	Fabrication methods
Section 27.605	Fasteners
Section 27.607	Protection of structure
Section 27.609	Lightning and static electricity protection
Section 27.610	Inspection provisions
Section 27.611	Material strength properties and design values
Section 27.613	Special factors
Section 27.619	Casting factors
Section 27.621	Bearing factors
Section 27.623	Fitting factors
Section 27.625	Flutter
Section 27.629	Pressure venting and drainage of rotor blades
Section 27.653	Mass balance
Section 27.659	Rotor blade clearance
Section 27.661	Ground resonance prevention means
Section 27.663	General
Section 27.671	Stability augmentation, automatic, and power-operated systems
Section 27.672	Primary flight control
Section 27.673	Interconnected controls
Section 27.674	Stops
Section 27.675	Control system locks
Section 27.679	Limit load static tests
Section 27.681	Operation tests
Section 27.683	Control system details
Section 27.685	Spring devices
Section 27.687	Autorotation control mechanism
Section 27.691	Power boost and power-operated control system
Section 27.695	Shock absorption tests
Section 27.723	Limit drop test
Section 27.725	Reserve energy absorption drop test
Section 27.727	Retracting mechanism
Section 27.729	Wheels
Section 27.731	Tires
Section 27.733	Brakes
Section 27.735	Skis
Section 27.737	Main float buoyancy
Section 27.751	Main float design
Section 27.753	Hulls
Section 27.755	Pilot compartment
Section 27.771	Pilot compartment view
Section 27.773	Windshields and windows
Section 27.775	Cockpit controls
Section 27.777	Motion and effect of cockpit controls
Section 27.779	Doors
Section 27.783	Seats, berths, litters, safety belts, and harnesses
Section 27.785	Cargo and baggage compartments
Section 27.787	Ditching
Section 27.801	Flight crew emergency exits
Section 27.805	Emergency exits
Section 27.807	Ventilation
Section 27.831	Heaters
Section 27.833	Compartment interiors
Section 27.853	Cargo and baggage compartments
Section 27.855	Heating systems
Section 27.859	Fire protection of structure, controls, and other parts
Section 27.861	Flammable fluid fire protection
Section 27.863	External loads
Section 27.865	Leveling marks
Section 27.871	Ballast provisions
Section 27.873	Installation
Section 27.901	Engines
Section 27.903	Engine vibration
Section 27.907	Design
Section 27.917	Rotor brake
Section 27.921	Rotor drive system and control mechanism tests
Section 27.923	Additional tests
Section 27.927	Shafting critical speed
Section 27.931	Shafting joints
Section 27.935	Turbine engine operating characteristics
Section 27.939	General
Section 27.951	Fuel system crash resistance
Section 27.952	Fuel system independence
Section 27.953	Fuel system lightning protection
Section 27.954	Fuel flow
Section 27.955	Unusable fuel supply
Section 27.959	Fuel system hot weather operation
Section 27.961	Fuel tanks: general
Section 27.963	Fuel tank tests
Section 27.965	Fuel tank installation
Section 27.967	Fuel tank expansion space
Section 27.969	Fuel tank sump
Section 27.971	Fuel tank filler connection
Section 27.973	Fuel tank vents
Section 27.975	Fuel tank outlet
Section 27.977	Fuel pumps
Section 27.991	Fuel system lines and fittings
Section 27.993	Fuel valves
Section 27.995	Fuel strainer or filter
Section 27.997	Fuel system drains
Section 27.999	Engines: General
Section 27.1011	Oil tanks
Section 27.1013	Oil tank tests
Section 27.1015	Oil lines and fittings
Section 27.1017	Oil strainer or filter
Section 27.1019	Oil system drains
Section 27.1021	Transmissions and gearboxes: General
Section 27.1027	General
Section 27.1041	Cooling tests
Section 27.1043	Cooling test procedures
Section 27.1045	Air induction
Section 27.1091	Induction system icing protection
Section 27.1093	General
Section 27.1121	Exhaust piping
Section 27.1123	Powerplant controls: general
Section 27.1141	Engine controls
Section 27.1143	Ignition switches
Section 27.1145	Mixture controls
Section 27.1147	Rotor brake controls
Section 27.1151	Powerplant accessories
Section 27.1163	Lines, fittings, and components
Section 27.1183	Flammable fluids
Section 27.1185	Ventilation and drainage
Section 27.1187	Shutoff means
Section 27.1189	Firewalls
Section 27.1191	Cowling and engine compartment covering
Section 27.1193	Other surfaces
Section 27.1194	Fire detector systems
Section 27.1195	Function and installation
Section 27.1301	Flight and navigation instruments
Section 27.1303	Powerplant instruments
Section 27.1305	Miscellaneous equipment
Section 27.1307	Equipment, systems, and installations
Section 27.1309	Electrical and electronic system lightning protection
Section 27.1316	High-intensity Radiated Fields (HIRF) Protection
Section 27.1317	Arrangement and visibility
Section 27.1321	Warning, caution, and advisory lights
Section 27.1322	Airspeed indicating system
Section 27.1323	Static pressure systems
Section 27.1325	Magnetic direction indicator
Section 27.1327	Automatic pilot system
Section 27.1329	Flight director systems
Section 27.1335	Powerplant instruments
Section 27.1337	General
Section 27.1351	Storage battery design and installation
Section 27.1353	Circuit protective devices
Section 27.1357	Master switch
Section 27.1361	Electric cables
Section 27.1365	Switches
Section 27.1367	Instrument lights
Section 27.1381	Landing lights
Section 27.1383	Position light system installation
Section 27.1385	Position light system dihedral angles
Section 27.1387	Position light distribution and intensities
Section 27.1389	Minimum intensities in the horizontal plane of forward and rear position lights
Section 27.1391	Minimum intensities in any vertical plane of forward and rear position lights
Section 27.1393	Maximum intensities in overlapping beams of forward and rear position lights
Section 27.1395	Color specifications
Section 27.1397	Riding light
Section 27.1399	Anticollision light system
Section 27.1401	General
Section 27.1411	Safety belts
Section 27.1413	Ditching equipment
Section 27.1415	Ice protection
Section 27.1419	Hydraulic systems
Section 27.1435	Cockpit voice recorders
Section 27.1457	Flight data recorders
Section 27.1459	Equipment containing high energy rotors
Section 27.1461	General
Section 27.1501	Airspeed limitations: general
Section 27.1503	Never-exceed speed
Section 27.1505	Rotor speed
Section 27.1509	Weight and center of gravity
Section 27.1519	Powerplant limitations
Section 27.1521	Minimum flight crew
Section 27.1523	Kinds of operations
Section 27.1525	Maximum operating altitude
Section 27.1527	Instructions for Continued Airworthiness
Section 27.1529	General
Section 27.1541	Instrument markings: general
Section 27.1543	Airspeed indicator
Section 27.1545	Magnetic direction indicator
Section 27.1547	Powerplant instruments
Section 27.1549	Oil quantity indicator
Section 27.1551	Fuel quantity indicator
Section 27.1553	Control markings
Section 27.1555	Miscellaneous markings and placards
Section 27.1557	Limitations placard
Section 27.1559	Safety equipment
Section 27.1561	Tail rotor
Section 27.1565	General
Section 27.1581	Operating limitations
Section 27.1583	Operating procedures
Section 27.1585	Performance information
Section 27.1587	Loading information
Section 27.1589	Applicability