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Title 14

Displaying title 14, up to date as of 7/08/2026. Title 14 was last amended 7/06/2026.
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Title 14Aeronautics and SpacePart / Section
Chapter IFederal Aviation Administration, Department of Transportation1 – 199
Subchapter GAir Carriers and Operators for Compensation or Hire: Certification and Operations110 – 139
Part 121Operating Requirements: Domestic, Flag, and Supplemental Operations121.1 – 121.1500
Subpart IAirplane Performance Operating Limitations121.171 – 121.207
§ 121.171Applicability.
§ 121.173General.
§ 121.175Airplanes: Reciprocating engine-powered: Weight limitations.
§ 121.177Airplanes: Reciprocating engine-powered: Takeoff limitations.
§ 121.179Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.
§ 121.181Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.
§ 121.183Part 25 airplanes with four or more engines: Reciprocating engine powered: En route limitations: Two engines inoperative.
§ 121.185Airplanes: Reciprocating engine-powered: Landing limitations: Destination airport.
§ 121.187Airplanes: Reciprocating engine-powered: Landing limitations: Alternate airport.
§ 121.189Airplanes: Turbine engine powered: Takeoff limitations.
§ 121.191Airplanes: Turbine engine powered: En route limitations: One engine inoperative.
§ 121.193Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.
§ 121.195Airplanes: Turbine engine powered: Landing limitations: Destination airports.
§ 121.197Airplanes: Turbine engine powered: Landing limitations: Alternate airports.
§ 121.198Cargo service airplanes: Increased zero fuel and landing weights.
§ 121.199Nontransport category airplanes: Takeoff limitations.
§ 121.201Nontransport category airplanes: En route limitations: One engine inoperative.
§ 121.203Nontransport category airplanes: Landing limitations: Destination airport.
§ 121.205Nontransport category airplanes: Landing limitations: Alternate airport.
§ 121.207Provisionally certificated airplanes: Operating limitations.