Historical CFR by Part
 
 

SectionTitleAmdtEff DateCurrent
Show details for Part 1 - DEFINITIONS AND ABBREVIATIONSPart 1 - DEFINITIONS AND ABBREVIATIONS
Show details for Part 3 - GENERAL REQUIREMENTSPart 3 - GENERAL REQUIREMENTS
Show details for Part 11 - GENERAL RULEMAKING PROCEDURESPart 11 - GENERAL RULEMAKING PROCEDURES
Show details for Part 13 - INVESTIGATIVE AND ENFORCEMENT PROCEDURESPart 13 - INVESTIGATIVE AND ENFORCEMENT PROCEDURES
Show details for Part 14 - RULES IMPLEMENTING THE EQUAL ACCESS TO JUSTICE ACT OF 1980Part 14 - RULES IMPLEMENTING THE EQUAL ACCESS TO JUSTICE ACT OF 1980
Show details for Part 15 - ADMINISTRATIVE CLAIMS UNDER FEDERAL TORT CLAIMS ACTPart 15 - ADMINISTRATIVE CLAIMS UNDER FEDERAL TORT CLAIMS ACT
Show details for Part 16 - RULES OF PRACTICE FOR FEDERALLY-ASSISTED AIRPORT ENFORCEMENT PROCEEDINGSPart 16 - RULES OF PRACTICE FOR FEDERALLY-ASSISTED AIRPORT ENFORCEMENT PROCEEDINGS
Show details for Part 17 - PROCEDURES FOR PROTESTS AND CONTRACTS DISPUTESPart 17 - PROCEDURES FOR PROTESTS AND CONTRACTS DISPUTES
Show details for Part 21 - CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTSPart 21 - CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
Show details for Part 23 - AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANESPart 23 - AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Show details for Part 25 - AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANESPart 25 - AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Show details for Part 26 - CONTINUED AIRWORTHINESS AND SAFETY IMPROVEMENTS FOR TRANSPORT CATEGORY AIRPLANESPart 26 - CONTINUED AIRWORTHINESS AND SAFETY IMPROVEMENTS FOR TRANSPORT CATEGORY AIRPLANES
Hide details for Part 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFTPart 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT
Sec. 27.1Applicability.02/01/1965
Sec. 27.1Applicability.27-3308/08/1996
Sec. 27.1Applicability.27-3710/18/1999Completed Icon
Sec. 27.2[Special retroactive requirements.]27-2809/16/1991
Sec. 27.2Special retroactive requirements.27-3710/18/1999Completed Icon
Sec. 27.21Proof of compliance.02/01/1965
Sec. 27.21Proof of compliance.27-2112/06/1984Completed Icon
Sec. 27.25Weight limits.02/01/1965
Sec. 27.25Weight limits.27-1102/01/1977
Sec. 27.25Weight limits.27-1403/01/1978
Sec. 27.25Weight limits.27-3610/05/1999
Sec. 27.25Weight limits.27-4403/31/2008
Sec. 27.25Weight limits.27-4406/16/2008Completed Icon
Sec. 27.27Center of gravity limits.02/01/1965
Sec. 27.27Center of gravity limits.27-202/25/1968Completed Icon
Sec. 27.29Empty weight and corresponding center of gravity.02/01/1965
Sec. 27.29Empty weight and corresponding center of gravity.27-1403/01/1978Completed Icon
Sec. 27.31Removable ballast.02/01/1965Completed Icon
Sec. 27.33Main rotor speed and pitch limits.02/01/1965
Sec. 27.33Main rotor speed and pitch limits.27-202/25/1968
Sec. 27.33Main rotor speed and pitch limits.27-1403/01/1978Completed Icon
Sec. 27.45Standard atmosphere and still air.02/01/1965
Sec. 27.45[General.]27-1403/01/1978
Sec. 27.45General.27-2112/06/1984Completed Icon
Sec. 27.51Takeoff.02/01/1965
Sec. 27.51Takeoff.27-4403/31/2008Completed Icon
Sec. 27.65Climb.02/01/1965
Sec. 27.65[Climb: All engines operating.]27-1403/01/1978
Sec. 27.65Climb: All engines operating.27-3308/08/1996Completed Icon
Sec. 27.67Climb: one engine inoperative.02/01/1965
Sec. 27.67Climb: one engine inoperative.27-1403/01/1978
Sec. 27.67Climb: one engine inoperative.27-2310/03/1988Completed Icon
Sec. 27.71[Glide performance.]27-2112/06/1984
Sec. 27.71[Autorotation performance]27-4403/31/2008Completed Icon
Sec. 27.49Performance at minimum operating speed.27-4403/31/2008Completed Icon
Sec. 27.75Landing.02/01/1965
Sec. 27.75Landing.27-1403/01/1978
Sec. 27.75Landing.27-4403/31/2008Completed Icon
Sec. 27.79Limiting height--speed envelope.02/01/1965
Sec. 27.79Limiting height--speed envelope.27-2112/06/1984Completed Icon
Sec. 27.87[Height--speed envelope.]27-4403/31/2008Completed Icon
Sec. 27.141General.02/01/1965
Sec. 27.141General.27-202/25/1968
Sec. 27.141General.27-1102/01/1977
Sec. 27.141General.27-1903/02/1983
Sec. 27.141General.27-2112/06/1984Completed Icon
Sec. 27.143Controllability and maneuverability.02/01/1965
Sec. 27.143Controllability and maneuverability.27-202/25/1968
Sec. 27.143Controllability and maneuverability.27-1403/01/1978
Sec. 27.143Controllability and maneuverability.27-2112/06/1984
Sec. 27.143Controllability and maneuverability.27-4403/31/2008Completed Icon
Sec. 27.151[Flight controls.]27-2112/06/1984Completed Icon
Sec. 27.161Trim control.02/01/1965
Sec. 27.161Trim control.27-2112/06/1984Completed Icon
Sec. 27.171Stability: general.02/01/1965Completed Icon
Sec. 27.173Static longitudinal stability.02/01/1965
Sec. 27.173Static longitudinal stability.27-202/25/1968
Sec. 27.173Static longitudinal stability.27-2112/06/1984
Sec. 27.173Static longitudinal stability.27-4403/31/2008Completed Icon
Sec. 27.175Demonstration of static longitudinal stability.02/01/1965
Sec. 27.175Demonstration of static longitudinal stability.27-202/25/1968
Sec. 27.175Demonstration of static longitudinal stability.27-1102/01/1977
Sec. 27.175Demonstration of static longitudinal stability.27-1403/01/1978
Sec. 27.175Demonstration of static longitudinal stability.27-2112/06/1984
Sec. 27.175Demonstration of static longitudinal stability.27-3411/28/1997
Sec. 27.175Demonstration of static longitudinal stability.27-4403/31/2008Completed Icon
Sec. 27.177[Static directional stability.]27-2112/06/1984
Sec. 27.177Static directional stability.27-4403/31/2008Completed Icon
Sec. 27.231General.02/01/1965Completed Icon
Sec. 27.235Taxiing condition.02/01/1965Completed Icon
Sec. 27.239Spray characteristics.02/01/1965Completed Icon
Sec. 27.241Ground resonance.02/01/1965Completed Icon
Sec. 27.251Vibration.02/01/1965Completed Icon
Sec. 27.301Loads.02/01/1965Completed Icon
Sec. 27.303Factor of safety.02/01/1965Completed Icon
Sec. 27.305Strength and deformation.02/01/1965Completed Icon
Sec. 27.307Proof of structure.02/01/1965
Sec. 27.307Proof of structure.27-310/17/1968
Sec. 27.307Proof of structure.27-2604/05/1990Completed Icon
Sec. 27.309Design limitations.02/01/1965Completed Icon
Sec. 27.321General.02/01/1965
Sec. 27.321General.27-1102/01/1977Completed Icon
Sec. 27.337Limit maneuvering load factor.02/01/1965
Sec. 27.337Limit maneuvering load factor.27-2604/05/1990Completed Icon
Sec. 27.339Resultant limit maneuvering loads.02/01/1965
Sec. 27.339Resultant limit maneuvering loads.27-1102/01/1977Completed Icon
Sec. 27.341Gust loads.02/01/1965Completed Icon
Sec. 27.351[Yawing conditions.]27-2604/05/1990
Sec. 27.351Yawing conditions.27-3411/28/1997Completed Icon
Sec. 27.361Engine torque.02/01/1965
Sec. 27.361Engine torque.27-2310/03/1988Completed Icon
Sec. 27.391General.02/01/1965
Sec. 27.391General.27-2604/05/1990
Sec. 27.391General.27-3411/28/1997Completed Icon
Sec. 27.395Control system.02/01/1965
Sec. 27.395Control system.27-2604/05/1990Completed Icon
Sec. 27.397Limit pilot forces.02/01/1965
Sec. 27.397[Limit pilot forces and torques.]27-1102/01/1977
Sec. 27.397Limit pilot forces and torques.27-4005/09/2001Completed Icon
Sec. 27.399Dual control system.02/01/1965Completed Icon
Sec. 27.401Auxiliary rotor assemblies.02/01/1965
Sec. 27.401Auxiliary rotor assemblies.27-310/17/1968
Sec. 27.401[Removed.]27-2710/22/1990Completed Icon
Sec. 27.403Auxiliary rotor attachment structure.02/01/1965
Sec. 27.403[Removed.]27-2710/22/1990Completed Icon
Sec. 27.411Ground clearance: tail rotor guard.02/01/1965Completed Icon
Sec. 27.413Stablilizing and control surfaces.02/01/1965
Sec. 27.413[Removed.]27-2710/22/1990Completed Icon
Sec. 27.427[Unsymmetrical loads.]27-2604/05/1990
Sec. 27.427Unsymmetrical loads.27-2710/22/1990Completed Icon
Sec. 27.471General.02/01/1965Completed Icon
Sec. 27.473Ground loading conditions and assumptions.02/01/1965
Sec. 27.473Ground loading conditions and assumptions.27-202/25/1968Completed Icon
Sec. 27.475Tires and shock absorbers.02/01/1965Completed Icon
Sec. 27.477Landing gear arrangement.02/01/1965Completed Icon
Sec. 27.479Level landing conditions.02/01/1965Completed Icon
Sec. 27.481Tail-down landing conditions.02/01/1965Completed Icon
Sec. 27.483One-wheel landing conditions.02/01/1965Completed Icon
Sec. 27.485Lateral drift landing conditions.02/01/1965Completed Icon
Sec. 27.493Braked roll conditions.02/01/1965Completed Icon
Sec. 27.497Ground loading conditions: landing gear with tail wheels.02/01/1965Completed Icon
Sec. 27.501Ground loading conditions: landing gear with skids.02/01/1965
Sec. 27.501Ground loading conditions: landing gear with skids.27-202/25/1968
Sec. 27.501Ground loading conditions: landing gear with skids.27-2604/05/1990Completed Icon
Sec. 27.505Ski landing conditions.02/01/1965Completed Icon
Sec. 27.521Float landing conditions.02/01/1965Completed Icon
Sec. 27.547Main rotor structure.02/01/1965
Sec. 27.547Main rotor structure.27-310/17/1968Completed Icon
Sec. 27.549Fuselage, landing gear, and rotor pylon structures.02/01/1965
Sec. 27.549Fuselage, landing gear, and rotor pylon structures.27-310/17/1968Completed Icon
Sec. 27.561General.02/01/1965
Sec. 27.561General.27-2512/13/1989
Sec. 27.561General.27-3011/02/1994
Sec. 27.561General.27-3206/11/1996Completed Icon
Sec. 27.562[Emergency landing dynamic conditions.]27-2512/13/1989Completed Icon
Sec. 27.563[Structural ditching provisions.]27-1102/01/1977
Sec. 27.563Structural ditching provisions.27-2604/05/1990Completed Icon
Sec. 27.571[Fatigue evaluation of flight structure.]27-310/17/1968
Sec. 27.571Fatigue evaluation of flight structure.27-1205/02/1977
Sec. 27.571Fatigue evaluation of flight structure.27-1810/14/1980
Sec. 27.571Fatigue evaluation of flight structure.27-2604/05/1990Completed Icon
Sec. 27.601Design.02/01/1965Completed Icon
Sec. 27.602[Critical parts.]27-3810/25/1999Completed Icon
Sec. 27.603Materials.02/01/1965
Sec. 27.603Materials.27-1102/01/1977
Sec. 27.603Materials.27-1612/01/1978Completed Icon
Sec. 27.605Fabrication methods.02/01/1965
Sec. 27.605Fabrication methods.27-1612/01/1978Completed Icon
Sec. 27.607Self-locking nuts.02/01/1965
Sec. 27.607[Fasteners.]27-410/27/1968Completed Icon
Sec. 27.609Protection of structure.02/01/1965Completed Icon
Sec. 27.610[Lightning protection.]27-2112/06/1984
Sec. 27.610[Lightning and static electricity protection.]27-3710/18/1999Completed Icon
Sec. 27.611Inspection provisions.02/01/1965Completed Icon
Sec. 27.613Material strength properties and design values.02/01/1965
Sec. 27.613Material strength properties and design values.27-1612/01/1978
Sec. 27.613Material strength properties and design values.27-2604/05/1990Completed Icon
Sec. 27.619Special factors.02/01/1965Completed Icon
Sec. 27.621Casting factors.02/01/1965
Sec. 27.621Casting factors.27-3411/28/1997Completed Icon
Sec. 27.623Bearing factors.02/01/1965Completed Icon
Sec. 27.625Fitting factors.02/01/1965
Sec. 27.625Fitting factors.27-3509/08/1998Completed Icon
Sec. 27.629Flutter.02/01/1965
Sec. 27.629Flutter.27-2604/05/1990Completed Icon
Sec. 27.653Pressure venting and drainage of main rotor blades.02/01/1965
Sec. 27.653Pressure venting and drainage of rotor blades.27-202/25/1968Completed Icon
Sec. 27.659Mass balance.02/01/1965
Sec. 27.659Mass balance.27-202/25/1968Completed Icon
Sec. 27.661Rotor blade clearance.02/01/1965
Sec. 27.661Rotor blade clearance.27-202/25/1968Completed Icon
Sec. 27.663[Ground resonance prevention means.]27-202/25/1968
Sec. 27.663Ground resonance prevention means.27-2604/05/1990Completed Icon
Sec. 27.671General.02/01/1965Completed Icon
Sec. 27.672[Stability augmentation, automatic, and power-operated systems.]27-2112/06/1984Completed Icon
Sec. 27.673[Primary flight control.]27-2112/06/1984Completed Icon
Sec. 27.674[Interconnected controls.]27-2604/05/1990Completed Icon
Sec. 27.675Stops.02/01/1965
Sec. 27.675Stops.27-1612/01/1978Completed Icon
Sec. 27.679Control system locks.02/01/1965Completed Icon
Sec. 27.681Limit load static tests.02/01/1965Completed Icon
Sec. 27.683Operation tests.02/01/1965Completed Icon
Sec. 27.685Control system details.02/01/1965
Sec. 27.685Control system details.27-1102/01/1977
Sec. 27.685Control system details.27-2604/05/1990Completed Icon
Sec. 27.687Spring devices.02/01/1965Completed Icon
Sec. 27.691Autorotation control mechanism.02/01/1965Completed Icon