62
14 CFR Ch. I (1–1–19 Edition)
Pt. 121
121.107
Dispatch centers.
Subpart F—Approval of Areas and Routes
for Supplemental Operations
121.111
Applicability.
121.113
Area and route requirements: Gen-
eral.
121.115
Route width.
121.117
Airports: Required data.
121.119
Weather reporting facilities.
121.121
En route navigation facilities.
121.122
Communications facilities—supple-
mental operations.
121.123
Servicing maintenance facilities.
121.125
Flight following system.
121.127
Flight following system; require-
ments.
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 air-
craft: Supplemental operations.
121.141
Airplane flight manual.
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 engine-
powered: Weight limitations.
121.177
Airplanes: Reciprocating engine-
powered: Takeoff limitations.
121.179
Airplanes: Reciprocating engine-
powered: En route limitations: All en-
gines operating.
121.181
Airplanes: Reciprocating engine-
powered: En route limitations: One en-
gine inoperative.
121.183
Part 25 airplanes with four or more
engines: Reciprocating engine powered:
En route limitations: Two engines inop-
erative.
121.185
Airplanes: Reciprocating engine-
powered: Landing limitations: Destina-
tion airport.
121.187
Airplanes: Reciprocating engine-
powered: Landing limitations: Alternate
airport.
121.189
Airplanes: Turbine engine powered:
Takeoff limitations.
121.191
Airplanes: Turbine engine powered:
En route limitations: One engine inoper-
ative.
121.193
Airplanes: Turbine engine powered:
En route limitations: Two engines inop-
erative.
121.195
Airplanes: Turbine engine powered:
Landing limitations: Destination air-
ports.
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 inoper-
ative.
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.
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 § 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 pres-
sure relief.
121.269
Extinguishing agent container com-
partment temperature.
121.271
Fire-extinguishing system mate-
rials.
121.273
Fire-detector systems.
121.275
Fire detectors.
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