Pt. 121
121.107

14 CFR Ch. I (1-1-19 Edition)
121.191 Airplanes: Turbine engine powered:
En route limitations: One engine inoperative.
121.193 Airplanes: Turbine engine powered:
En route limitations: Two engines inoperative.
121.195 Airplanes: Turbine engine powered:
Landing limitations: Destination airports.
121.197 Airplanes: Turbine engine powered:
Landing limitations: Alternate airports.
121.198 Cargo service airplanes: Increased
zero fuel and landing weights.
121.199 Nontransport category airplanes:
Takeoff limitations.
121.201 Nontransport category airplanes: En
route limitations: One engine inoperative.
121.203 Nontransport category airplanes:
Landing limitations: Destination airport.
121.205 Nontransport category airplanes:
Landing limitations: Alternate airport.
121.207 Provisionally certificated airplanes:
Operating limitations.

Dispatch centers.

Subpart F - Approval of Areas and Routes
for Supplemental Operations
121.111 Applicability.
121.113 Area and route requirements: General.
121.115 Route width.
121.117 Airports: Required data.
121.119 Weather reporting facilities.
121.121 En route navigation facilities.
121.122 Communications facilities - supplemental operations.
121.123 Servicing maintenance facilities.
121.125 Flight following system.
121.127 Flight following system; requirements.

Subpart G - Manual Requirements
121.131 Applicability.
121.133 Preparation.
121.135 Manual contents.
121.137 Distribution and availability.
121.139 Requirements for manual aboard aircraft: Supplemental operations.
121.141 Airplane flight manual.

Subpart J - Special Airworthiness
Requirements
121.211 Applicability.
121.213 [Reserved]
121.215 Cabin interiors.
121.217 Internal doors.
121.219 Ventilation.
121.221 Fire precautions.
121.223 Proof of compliance with Section 121.221.
121.225 Propeller deicing fluid.
121.227 Pressure cross-feed arrangements.
121.229 Location of fuel tanks.
121.231 Fuel system lines and fittings.
121.233 Fuel lines and fittings in designated
fire zones.
121.235 Fuel valves.
121.237 Oil lines and fittings in designated
fire zones.
121.239 Oil valves.
121.241 Oil system drains.
121.243 Engine breather lines.
121.245 Fire walls.
121.247 Fire-wall construction.
121.249 Cowling.
121.251 Engine accessory section diaphragm.
121.253 Powerplant fire protection.
121.255 Flammable fluids.
121.257 Shutoff means.
121.259 Lines and fittings.
121.261 Vent and drain lines.
121.263 Fire-extinguishing systems.
121.265 Fire-extinguishing agents.
121.267 Extinguishing agent container pressure relief.
121.269 Extinguishing agent container compartment temperature.
121.271 Fire-extinguishing system materials.
121.273 Fire-detector systems.
121.275 Fire detectors.

Subpart H - Aircraft Requirements
121.151 Applicability.
121.153 Aircraft requirements: General.
121.155 [Reserved]
121.157 Aircraft certification and equipment
requirements.
121.159 Single-engine airplanes prohibited.
121.161 Airplane limitations: Type of route.
121.162 ETOPS Type Design Approval Basis.
121.163 Aircraft proving tests.

Subpart I - Airplane Performance
Operating Limitations
121.171 Applicability.
121.173 General.
121.175 Airplanes: Reciprocating enginepowered: Weight limitations.
121.177 Airplanes: Reciprocating enginepowered: Takeoff limitations.
121.179 Airplanes: Reciprocating enginepowered: En route limitations: All engines operating.
121.181 Airplanes: Reciprocating enginepowered: En route limitations: One engine inoperative.
121.183 Part 25 airplanes with four or more
engines: Reciprocating engine powered:
En route limitations: Two engines inoperative.
121.185 Airplanes: Reciprocating enginepowered: Landing limitations: Destination airport.
121.187 Airplanes: Reciprocating enginepowered: Landing limitations: Alternate
airport.
121.189 Airplanes: Turbine engine powered:
Takeoff limitations.

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