Atlas / eCFR / Subchapter C / Part 25
14 CFR · Part 25
AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
20 Legal Interpretations 936 Special Conditions 1441 ELOS findings
Authority
49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).
Source
Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.
Subpart A — General
5 sections
Subpart B — Flight
41 sections
- § 25.21 § 25.21 Proof of compliance. ↗
- § 25.23 § 25.23 Load distribution limits. ↗
- § 25.25 § 25.25 Weight limits. ↗
- § 25.27 § 25.27 Center of gravity limits. ↗
- § 25.29 § 25.29 Empty weight and corresponding center of gravity. ↗
- § 25.31 § 25.31 Removable ballast. ↗
- § 25.33 § 25.33 Propeller speed and pitch limits. ↗
- § 25.101 § 25.101 General. ↗
- § 25.103 § 25.103 Stall speed. ↗
- § 25.105 § 25.105 Takeoff. ↗
- § 25.107 § 25.107 Takeoff speeds. ↗
- § 25.109 § 25.109 Accelerate-stop distance. ↗
- § 25.111 § 25.111 Takeoff path. ↗
- § 25.113 § 25.113 Takeoff distance and takeoff run. ↗
- § 25.115 § 25.115 Takeoff flight path. ↗
- § 25.117 § 25.117 Climb: general. ↗
- § 25.119 § 25.119 Landing climb: All-engines-operating. ↗
- § 25.121 § 25.121 Climb: One-engine-inoperative. ↗
- § 25.123 § 25.123 En route flight paths. ↗
- § 25.125 § 25.125 Landing. ↗
- § 25.143 § 25.143 General. ↗
- § 25.145 § 25.145 Longitudinal control. ↗
- § 25.147 § 25.147 Directional and lateral control. ↗
- § 25.149 § 25.149 Minimum control speed. ↗
- § 25.161 § 25.161 Trim. ↗
- § 25.171 § 25.171 General. ↗
- § 25.173 § 25.173 Static longitudinal stability. ↗
- § 25.175 § 25.175 Demonstration of static longitudinal stability. ↗
- § 25.177 § 25.177 Static lateral-directional stability. ↗
- § 25.181 § 25.181 Dynamic stability. ↗
- § 25.201 § 25.201 Stall demonstration. ↗
- § 25.203 § 25.203 Stall characteristics. ↗
- § 25.207 § 25.207 Stall warning. ↗
- § 25.231 § 25.231 Longitudinal stability and control. ↗
- § 25.233 § 25.233 Directional stability and control. ↗
- § 25.235 § 25.235 Taxiing condition. ↗
- § 25.237 § 25.237 Wind velocities. ↗
- § 25.239 § 25.239 Spray characteristics, control, and stability on water. ↗
- § 25.251 § 25.251 Vibration and buffeting. ↗
- § 25.253 § 25.253 High-speed characteristics. ↗
- § 25.255 § 25.255 Out-of-trim characteristics. ↗
Subpart C — Structure
69 sections
- § 25.301 § 25.301 Loads. ↗
- § 25.302 § 25.302 Interaction of systems and structures. ↗
- § 25.303 § 25.303 Factor of safety. ↗
- § 25.305 § 25.305 Strength and deformation. ↗
- § 25.307 § 25.307 Proof of structure. ↗
- § 25.321 § 25.321 General. ↗
- § 25.331 § 25.331 Symmetric maneuvering conditions. ↗
- § 25.333 § 25.333 Flight maneuvering envelope. ↗
- § 25.335 § 25.335 Design airspeeds. ↗
- § 25.337 § 25.337 Limit maneuvering load factors. ↗
- § 25.341 § 25.341 Gust and turbulence loads. ↗
- § 25.343 § 25.343 Design fuel and oil loads. ↗
- § 25.345 § 25.345 High lift devices. ↗
- § 25.349 § 25.349 Rolling conditions. ↗
- § 25.351 § 25.351 Yaw maneuver conditions. ↗
- § 25.353 § 25.353 Rudder control reversal conditions. ↗
- § 25.361 § 25.361 Engine and auxiliary power unit torque. ↗
- § 25.362 § 25.362 Engine failure loads. ↗
- § 25.363 § 25.363 Side load on engine and auxiliary power unit mounts. ↗
- § 25.365 § 25.365 Pressurized compartment loads. ↗
- § 25.367 § 25.367 Unsymmetrical loads due to engine failure. ↗
- § 25.371 § 25.371 Gyroscopic loads. ↗
- § 25.373 § 25.373 Speed control devices. ↗
- § 25.391 § 25.391 Control surface loads: General. ↗
- § 25.393 § 25.393 Loads parallel to hinge line. ↗
- § 25.395 § 25.395 Control system. ↗
- § 25.397 § 25.397 Control system loads. ↗
- § 25.399 § 25.399 Dual control system. ↗
- § 25.405 § 25.405 Secondary control system. ↗
- § 25.407 § 25.407 Trim tab effects. ↗
- § 25.409 § 25.409 Tabs. ↗
- § 25.415 § 25.415 Ground gust conditions. ↗
- § 25.427 § 25.427 Unsymmetrical loads. ↗
- § 25.445 § 25.445 Auxiliary aerodynamic surfaces. ↗
- § 25.457 § 25.457 Wing flaps. ↗
- § 25.459 § 25.459 Special devices. ↗
- § 25.471 § 25.471 General. ↗
- § 25.473 § 25.473 Landing load conditions and assumptions. ↗
- § 25.477 § 25.477 Landing gear arrangement. ↗
- § 25.479 § 25.479 Level landing conditions. ↗
- § 25.481 § 25.481 Tail-down landing conditions. ↗
- § 25.483 § 25.483 One-gear landing conditions. ↗
- § 25.485 § 25.485 Side load conditions. ↗
- § 25.487 § 25.487 Rebound landing condition. ↗
- § 25.489 § 25.489 Ground handling conditions. ↗
- § 25.491 § 25.491 Taxi, takeoff and landing roll. ↗
- § 25.493 § 25.493 Braked roll conditions. ↗
- § 25.495 § 25.495 Turning. ↗
- § 25.497 § 25.497 Tail-wheel yawing. ↗
- § 25.499 § 25.499 Nose-wheel yaw and steering. ↗
- § 25.503 § 25.503 Pivoting. ↗
- § 25.507 § 25.507 Reversed braking. ↗
- § 25.509 § 25.509 Towing loads. ↗
- § 25.511 § 25.511 Ground load: unsymmetrical loads on multiple-wheel units. ↗
- § 25.519 § 25.519 Jacking and tie-down provisions. ↗
- § 25.521 § 25.521 General. ↗
- § 25.523 § 25.523 Design weights and center of gravity positions. ↗
- § 25.525 § 25.525 Application of loads. ↗
- § 25.527 § 25.527 Hull and main float load factors. ↗
- § 25.529 § 25.529 Hull and main float landing conditions. ↗
- § 25.531 § 25.531 Hull and main float takeoff condition. ↗
- § 25.533 § 25.533 Hull and main float bottom pressures. ↗
- § 25.535 § 25.535 Auxiliary float loads. ↗
- § 25.537 § 25.537 Seawing loads. ↗
- § 25.561 § 25.561 General. ↗
- § 25.562 § 25.562 Emergency landing dynamic conditions. ↗
- § 25.563 § 25.563 Structural ditching provisions. ↗
- § 25.571 § 25.571 Damage-tolerance and fatigue evaluation of structure. ↗
- § 25.581 § 25.581 Lightning protection. ↗
Subpart D — Design and Construction
87 sections
- § 25.601 § 25.601 General. ↗
- § 25.603 § 25.603 Materials. ↗
- § 25.605 § 25.605 Fabrication methods. ↗
- § 25.607 § 25.607 Fasteners. ↗
- § 25.609 § 25.609 Protection of structure. ↗
- § 25.611 § 25.611 Accessibility provisions. ↗
- § 25.613 § 25.613 Material strength properties and material design values. ↗
- § 25.619 § 25.619 Special factors. ↗
- § 25.621 § 25.621 Casting factors. ↗
- § 25.623 § 25.623 Bearing factors. ↗
- § 25.625 § 25.625 Fitting factors. ↗
- § 25.629 § 25.629 Aeroelastic stability requirements. ↗
- § 25.631 § 25.631 Bird strike damage. ↗
- § 25.651 § 25.651 Proof of strength. ↗
- § 25.655 § 25.655 Installation. ↗
- § 25.657 § 25.657 Hinges. ↗
- § 25.671 § 25.671 General. ↗
- § 25.672 § 25.672 Stability augmentation and automatic and power-operated systems. ↗
- § 25.675 § 25.675 Stops. ↗
- § 25.677 § 25.677 Trim systems. ↗
- § 25.679 § 25.679 Control system gust locks. ↗
- § 25.681 § 25.681 Limit load static tests. ↗
- § 25.683 § 25.683 Operation tests. ↗
- § 25.685 § 25.685 Control system details. ↗
- § 25.689 § 25.689 Cable systems. ↗
- § 25.693 § 25.693 Joints. ↗
- § 25.697 § 25.697 Lift and drag devices, controls. ↗
- § 25.699 § 25.699 Lift and drag device indicator. ↗
- § 25.701 § 25.701 Flap and slat interconnection. ↗
- § 25.703 § 25.703 Takeoff warning system. ↗
- § 25.721 § 25.721 General. ↗
- § 25.723 § 25.723 Shock absorption tests. ↗
- § 25.725-25.727 §§ 25.725-25.727 [Reserved] ↗
- § 25.729 § 25.729 Retracting mechanism. ↗
- § 25.731 § 25.731 Wheels. ↗
- § 25.733 § 25.733 Tires. ↗
- § 25.735 § 25.735 Brakes and braking systems. ↗
- § 25.737 § 25.737 Skis. ↗
- § 25.751 § 25.751 Main float buoyancy. ↗
- § 25.753 § 25.753 Main float design. ↗
- § 25.755 § 25.755 Hulls. ↗
- § 25.771 § 25.771 Pilot compartment. ↗
- § 25.772 § 25.772 Pilot compartment doors. ↗
- § 25.773 § 25.773 Pilot compartment view. ↗
- § 25.775 § 25.775 Windshields and windows. ↗
- § 25.777 § 25.777 Cockpit controls. ↗
- § 25.779 § 25.779 Motion and effect of cockpit controls. ↗
- § 25.781 § 25.781 Cockpit control knob shape. ↗
- § 25.783 § 25.783 Fuselage doors. ↗
- § 25.785 § 25.785 Seats, berths, safety belts, and harnesses. ↗
- § 25.787 § 25.787 Stowage compartments. ↗
- § 25.789 § 25.789 Retention of items of mass in passenger and crew compartments and galleys. ↗
- § 25.791 § 25.791 Passenger information signs and placards. ↗
- § 25.793 § 25.793 Floor surfaces. ↗
- § 25.795 § 25.795 Security considerations. ↗
- § 25.801 § 25.801 Ditching. ↗
- § 25.803 § 25.803 Emergency evacuation. ↗
- § 25.807 § 25.807 Emergency exits. ↗
- § 25.809 § 25.809 Emergency exit arrangement. ↗
- § 25.810 § 25.810 Emergency egress assist means and escape routes. ↗
- § 25.811 § 25.811 Emergency exit marking. ↗
- § 25.812 § 25.812 Emergency lighting. ↗
- § 25.813 § 25.813 Emergency exit access. ↗
- § 25.815 § 25.815 Width of aisle. ↗
- § 25.817 § 25.817 Maximum number of seats abreast. ↗
- § 25.819 § 25.819 Lower deck service compartments (including galleys). ↗
- § 25.820 § 25.820 Lavatory doors. ↗
- § 25.831 § 25.831 Ventilation. ↗
- § 25.832 § 25.832 Cabin ozone concentration. ↗
- § 25.833 § 25.833 Combustion heating systems. ↗
- § 25.841 § 25.841 Pressurized cabins. ↗
- § 25.843 § 25.843 Tests for pressurized cabins. ↗
- § 25.851 § 25.851 Fire extinguishers. ↗
- § 25.853 § 25.853 Compartment interiors. ↗
- § 25.854 § 25.854 Lavatory fire protection. ↗
- § 25.855 § 25.855 Cargo or baggage compartments. ↗
- § 25.856 § 25.856 Thermal/Acoustic insulation materials. ↗
- § 25.857 § 25.857 Cargo compartment classification. ↗
- § 25.858 § 25.858 Cargo or baggage compartment smoke or fire detection systems. ↗
- § 25.859 § 25.859 Combustion heater fire protection. ↗
- § 25.863 § 25.863 Flammable fluid fire protection. ↗
- § 25.865 § 25.865 Fire protection of flight controls, engine mounts, and other flight structure. ↗
- § 25.867 § 25.867 Fire protection: other components. ↗
- § 25.869 § 25.869 Fire protection: systems. ↗
- § 25.871 § 25.871 Leveling means. ↗
- § 25.875 § 25.875 Reinforcement near propellers. ↗
- § 25.899 § 25.899 Electrical bonding and protection against static electricity. ↗
Subpart E — Powerplant
90 sections
- § 25.901 § 25.901 Installation. ↗
- § 25.903 § 25.903 Engines. ↗
- § 25.904 § 25.904 Automatic takeoff thrust control system (ATTCS). ↗
- § 25.905 § 25.905 Propellers. ↗
- § 25.907 § 25.907 Propeller vibration and fatigue. ↗
- § 25.925 § 25.925 Propeller clearance. ↗
- § 25.929 § 25.929 Propeller deicing. ↗
- § 25.933 § 25.933 Reversing systems. ↗
- § 25.934 § 25.934 Turbojet engine thrust reverser system tests. ↗
- § 25.937 § 25.937 Turbopropeller-drag limiting systems. ↗
- § 25.939 § 25.939 Turbine engine operating characteristics. ↗
- § 25.941 § 25.941 Inlet, engine, and exhaust compatibility. ↗
- § 25.943 § 25.943 Negative acceleration. ↗
- § 25.945 § 25.945 Thrust or power augmentation system. ↗
- § 25.951 § 25.951 General. ↗
- § 25.952 § 25.952 Fuel system analysis and test. ↗
- § 25.953 § 25.953 Fuel system independence. ↗
- § 25.954 § 25.954 Fuel system lightning protection. ↗
- § 25.955 § 25.955 Fuel flow. ↗
- § 25.957 § 25.957 Flow between interconnected tanks. ↗
- § 25.959 § 25.959 Unusable fuel supply. ↗
- § 25.961 § 25.961 Fuel system hot weather operation. ↗
- § 25.963 § 25.963 Fuel tanks: general. ↗
- § 25.965 § 25.965 Fuel tank tests. ↗
- § 25.967 § 25.967 Fuel tank installations. ↗
- § 25.969 § 25.969 Fuel tank expansion space. ↗
- § 25.971 § 25.971 Fuel tank sump. ↗
- § 25.973 § 25.973 Fuel tank filler connection. ↗
- § 25.975 § 25.975 Fuel tank vents and carburetor vapor vents. ↗
- § 25.977 § 25.977 Fuel tank outlet. ↗
- § 25.979 § 25.979 Pressure fueling system. ↗
- § 25.981 § 25.981 Fuel tank explosion prevention. ↗
- § 25.991 § 25.991 Fuel pumps. ↗
- § 25.993 § 25.993 Fuel system lines and fittings. ↗
- § 25.994 § 25.994 Fuel system components. ↗
- § 25.995 § 25.995 Fuel valves. ↗
- § 25.997 § 25.997 Fuel strainer or filter. ↗
- § 25.999 § 25.999 Fuel system drains. ↗
- § 25.1001 § 25.1001 Fuel jettisoning system. ↗
- § 25.1011 § 25.1011 General. ↗
- § 25.1013 § 25.1013 Oil tanks. ↗
- § 25.1015 § 25.1015 Oil tank tests. ↗
- § 25.1017 § 25.1017 Oil lines and fittings. ↗
- § 25.1019 § 25.1019 Oil strainer or filter. ↗
- § 25.1021 § 25.1021 Oil system drains. ↗
- § 25.1023 § 25.1023 Oil radiators. ↗
- § 25.1025 § 25.1025 Oil valves. ↗
- § 25.1027 § 25.1027 Propeller feathering system. ↗
- § 25.1041 § 25.1041 General. ↗
- § 25.1043 § 25.1043 Cooling tests. ↗
- § 25.1045 § 25.1045 Cooling test procedures. ↗
- § 25.1091 § 25.1091 Air induction. ↗
- § 25.1093 § 25.1093 Induction system icing protection. ↗
- § 25.1101 § 25.1101 Carburetor air preheater design. ↗
- § 25.1103 § 25.1103 Induction system ducts and air duct systems. ↗
- § 25.1105 § 25.1105 Induction system screens. ↗
- § 25.1107 § 25.1107 Inter-coolers and after-coolers. ↗
- § 25.1121 § 25.1121 General. ↗
- § 25.1123 § 25.1123 Exhaust piping. ↗
- § 25.1125 § 25.1125 Exhaust heat exchangers. ↗
- § 25.1127 § 25.1127 Exhaust driven turbo-superchargers. ↗
- § 25.1141 § 25.1141 Powerplant controls: general. ↗
- § 25.1142 § 25.1142 Auxiliary power unit controls. ↗
- § 25.1143 § 25.1143 Engine controls. ↗
- § 25.1145 § 25.1145 Ignition switches. ↗
- § 25.1147 § 25.1147 Mixture controls. ↗
- § 25.1149 § 25.1149 Propeller speed and pitch controls. ↗
- § 25.1153 § 25.1153 Propeller feathering controls. ↗
- § 25.1155 § 25.1155 Reverse thrust and propeller pitch settings below the flight regime. ↗
- § 25.1157 § 25.1157 Carburetor air temperature controls. ↗
- § 25.1159 § 25.1159 Supercharger controls. ↗
- § 25.1161 § 25.1161 Fuel jettisoning system controls. ↗
- § 25.1163 § 25.1163 Powerplant accessories. ↗
- § 25.1165 § 25.1165 Engine ignition systems. ↗
- § 25.1167 § 25.1167 Accessory gearboxes. ↗
- § 25.1181 § 25.1181 Designated fire zones; regions included. ↗
- § 25.1182 § 25.1182 Nacelle areas behind firewalls, and engine pod attaching structures containing flammable fluid lines. ↗
- § 25.1183 § 25.1183 Flammable fluid-carrying components. ↗
- § 25.1185 § 25.1185 Flammable fluids. ↗
- § 25.1187 § 25.1187 Drainage and ventilation of fire zones. ↗
- § 25.1189 § 25.1189 Shutoff means. ↗
- § 25.1191 § 25.1191 Firewalls. ↗
- § 25.1192 § 25.1192 Engine accessory section diaphragm. ↗
- § 25.1193 § 25.1193 Cowling and nacelle skin. ↗
- § 25.1195 § 25.1195 Fire extinguishing systems. ↗
- § 25.1197 § 25.1197 Fire extinguishing agents. ↗
- § 25.1199 § 25.1199 Extinguishing agent containers. ↗
- § 25.1201 § 25.1201 Fire extinguishing system materials. ↗
- § 25.1203 § 25.1203 Fire detector system. ↗
- § 25.1207 § 25.1207 Compliance. ↗
Subpart F — Equipment
62 sections
- § 25.1301 § 25.1301 Function and installation. ↗
- § 25.1302 § 25.1302 Installed systems and equipment for use by the flightcrew. ↗
- § 25.1303 § 25.1303 Flight and navigation instruments. ↗
- § 25.1305 § 25.1305 Powerplant instruments. ↗
- § 25.1307 § 25.1307 Miscellaneous equipment. ↗
- § 25.1309 § 25.1309 Equipment, systems, and installations. ↗
- § 25.1310 § 25.1310 Power source capacity and distribution. ↗
- § 25.1316 § 25.1316 Electrical and electronic system lightning protection. ↗
- § 25.1317 § 25.1317 High-intensity Radiated Fields (HIRF) Protection. ↗
- § 25.1321 § 25.1321 Arrangement and visibility. ↗
- § 25.1322 § 25.1322 Flightcrew alerting. ↗
- § 25.1323 § 25.1323 Airspeed indicating system. ↗
- § 25.1324 § 25.1324 Angle of attack system. ↗
- § 25.1325 § 25.1325 Static pressure systems. ↗
- § 25.1326 § 25.1326 Pitot heat indication systems. ↗
- § 25.1327 § 25.1327 Magnetic direction indicator. ↗
- § 25.1329 § 25.1329 Flight guidance system. ↗
- § 25.1331 § 25.1331 Instruments using a power supply. ↗
- § 25.1333 § 25.1333 Instrument systems. ↗
- § 25.1337 § 25.1337 Powerplant instruments. ↗
- § 25.1351 § 25.1351 General. ↗
- § 25.1353 § 25.1353 Electrical equipment and installations. ↗
- § 25.1355 § 25.1355 Distribution system. ↗
- § 25.1357 § 25.1357 Circuit protective devices. ↗
- § 25.1360 § 25.1360 Precautions against injury. ↗
- § 25.1362 § 25.1362 Electrical supplies for emergency conditions. ↗
- § 25.1363 § 25.1363 Electrical system tests. ↗
- § 25.1365 § 25.1365 Electrical appliances, motors, and transformers. ↗
- § 25.1381 § 25.1381 Instrument lights. ↗
- § 25.1383 § 25.1383 Landing lights. ↗
- § 25.1385 § 25.1385 Position light system installation. ↗
- § 25.1387 § 25.1387 Position light system dihedral angles. ↗
- § 25.1389 § 25.1389 Position light distribution and intensities. ↗
- § 25.1391 § 25.1391 Minimum intensities in the horizontal plane of forward and rear position lights. ↗
- § 25.1393 § 25.1393 Minimum intensities in any vertical plane of forward and rear position lights. ↗
- § 25.1395 § 25.1395 Maximum intensities in overlapping beams of forward and rear position lights. ↗
- § 25.1397 § 25.1397 Color specifications. ↗
- § 25.1399 § 25.1399 Riding light. ↗
- § 25.1401 § 25.1401 Anticollision light system. ↗
- § 25.1403 § 25.1403 Wing icing detection lights. ↗
- § 25.1411 § 25.1411 General. ↗
- § 25.1415 § 25.1415 Ditching equipment. ↗
- § 25.1419 § 25.1419 Ice protection. ↗
- § 25.1420 § 25.1420 Supercooled large drop icing conditions. ↗
- § 25.1421 § 25.1421 Megaphones. ↗
- § 25.1423 § 25.1423 Public address system. ↗
- § 25.1431 § 25.1431 Electronic equipment. ↗
- § 25.1433 § 25.1433 Vacuum systems. ↗
- § 25.1435 § 25.1435 Hydraulic systems. ↗
- § 25.1438 § 25.1438 Pressurization and pneumatic systems. ↗
- § 25.1439 § 25.1439 Protective breathing equipment. ↗
- § 25.1441 § 25.1441 Oxygen equipment and supply. ↗
- § 25.1443 § 25.1443 Minimum mass flow of supplemental oxygen. ↗
- § 25.1445 § 25.1445 Equipment standards for the oxygen distributing system. ↗
- § 25.1447 § 25.1447 Equipment standards for oxygen dispensing units. ↗
- § 25.1449 § 25.1449 Means for determining use of oxygen. ↗
- § 25.1450 § 25.1450 Chemical oxygen generators. ↗
- § 25.1453 § 25.1453 Protection of oxygen equipment from rupture. ↗
- § 25.1455 § 25.1455 Draining of fluids subject to freezing. ↗
- § 25.1457 § 25.1457 Cockpit voice recorders. ↗
- § 25.1459 § 25.1459 Flight data recorders. ↗
- § 25.1461 § 25.1461 Equipment containing high energy rotors. ↗
Subpart G — Operating Limitations and Information
34 sections
- § 25.1501 § 25.1501 General. ↗
- § 25.1503 § 25.1503 Airspeed limitations: general. ↗
- § 25.1505 § 25.1505 Maximum operating limit speed. ↗
- § 25.1507 § 25.1507 Maneuvering speed. ↗
- § 25.1511 § 25.1511 Flap extended speed. ↗
- § 25.1513 § 25.1513 Minimum control speed. ↗
- § 25.1515 § 25.1515 Landing gear speeds. ↗
- § 25.1516 § 25.1516 Other speed limitations. ↗
- § 25.1517 § 25.1517 Rough air speed, V RA. ↗
- § 25.1519 § 25.1519 Weight, center of gravity, and weight distribution. ↗
- § 25.1521 § 25.1521 Powerplant limitations. ↗
- § 25.1522 § 25.1522 Auxiliary power unit limitations. ↗
- § 25.1523 § 25.1523 Minimum flight crew. ↗
- § 25.1525 § 25.1525 Kinds of operation. ↗
- § 25.1527 § 25.1527 Ambient air temperature and operating altitude. ↗
- § 25.1529 § 25.1529 Instructions for Continued Airworthiness. ↗
- § 25.1531 § 25.1531 Maneuvering flight load factors. ↗
- § 25.1533 § 25.1533 Additional operating limitations. ↗
- § 25.1535 § 25.1535 ETOPS approval. ↗
- § 25.1541 § 25.1541 General. ↗
- § 25.1543 § 25.1543 Instrument markings: general. ↗
- § 25.1545 § 25.1545 Airspeed limitation information. ↗
- § 25.1547 § 25.1547 Magnetic direction indicator. ↗
- § 25.1549 § 25.1549 Powerplant and auxiliary power unit instruments. ↗
- § 25.1551 § 25.1551 Oil quantity indication. ↗
- § 25.1553 § 25.1553 Fuel quantity indicator. ↗
- § 25.1555 § 25.1555 Control markings. ↗
- § 25.1557 § 25.1557 Miscellaneous markings and placards. ↗
- § 25.1561 § 25.1561 Safety equipment. ↗
- § 25.1563 § 25.1563 Airspeed placard. ↗
- § 25.1581 § 25.1581 General. ↗
- § 25.1583 § 25.1583 Operating limitations. ↗
- § 25.1585 § 25.1585 Operating procedures. ↗
- § 25.1587 § 25.1587 Performance information. ↗
Subpart H — Electrical Wiring Interconnection Systems (EWIS)
17 sections
- § 25.1701 § 25.1701 Definition. ↗
- § 25.1703 § 25.1703 Function and installation: EWIS. ↗
- § 25.1705 § 25.1705 Systems and functions: EWIS. ↗
- § 25.1707 § 25.1707 System separation: EWIS. ↗
- § 25.1709 § 25.1709 System safety: EWIS. ↗
- § 25.1711 § 25.1711 Component identification: EWIS. ↗
- § 25.1713 § 25.1713 Fire protection: EWIS. ↗
- § 25.1715 § 25.1715 Electrical bonding and protection against static electricity: EWIS. ↗
- § 25.1717 § 25.1717 Circuit protective devices: EWIS. ↗
- § 25.1719 § 25.1719 Accessibility provisions: EWIS. ↗
- § 25.1721 § 25.1721 Protection of EWIS. ↗
- § 25.1723 § 25.1723 Flammable fluid fire protection: EWIS. ↗
- § 25.1725 § 25.1725 Powerplants: EWIS. ↗
- § 25.1727 § 25.1727 Flammable fluid shutoff means: EWIS. ↗
- § 25.1729 § 25.1729 Instructions for Continued Airworthiness: EWIS. ↗
- § 25.1731 § 25.1731 Powerplant and APU fire detector system: EWIS. ↗
- § 25.1733 § 25.1733 Fire detector systems, general: EWIS. ↗
Subpart I — Special Federal Aviation Regulations
1 section
Appendices & SFARs
- SFAR Special Federal Aviation Regulation No. 13 ↗
- SFAR Special Federal Aviation Regulation No. 109 ↗
- App Appendix A to Part 25 ↗
- App Appendix B to Part 25 ↗
- App Appendix C to Part 25 ↗
- App Appendix D to Part 25 ↗
- App Appendix E to Part 25 ↗
- App Appendix F to Part 25 ↗
- App Appendix H to Part 25—Instructions for Continued Airworthiness ↗
- App Appendix I to Part 25—Installation of an Automatic Takeoff Thrust Control System (ATTCS) ↗
- App Appendix J to Part 25—Emergency Evacuation ↗
- App Appendix K to Part 25—Extended Operations (ETOPS) ↗
- App Appendix L to Part 25—HIRF Environments and Equipment HIRF Test Levels ↗
- App Appendix M to Part 25—Fuel Tank System Flammability Reduction Means ↗
- App Appendix N to Part 25—Fuel Tank Flammability Exposure and Reliability Analysis ↗
- App Appendix O to Part 25—Supercooled Large Drop Icing Conditions ↗
Related Advisory Circulars
ACs whose subject series maps to Part 25. 191 current, 155 cancelled.
- AC 20-135APowerplant Installation and Propulsion System Component Fire Protection Test Methods, Standards, and CriteriaCurrent2025-09-29↗
- AC 20-167BAirworthiness Approval of Enhanced Vision System, Enhanced Flight Vision System, and Combined Vision System EquipmentCurrent2025-09-08↗
- AC 20-197Turbine Engine and Airframe Sensor Icing ComplianceCurrent2025-06-18↗
- AC 20-146AMethodology for Dynamic Seat Certification by Analysis for Use in Parts 23, 25, 27, and 29 Airplanes and RotorcraftCurrent2024-11-29↗
- AC 25.1309-1BSystem Design and AnalysisCurrent2024-08-30↗
- AC 25.629-1CAeroelastic Stability Substantiation of Transport Category AirplanesCurrent2024-08-30↗
- AC 25.671-1Control Systems—GeneralCurrent2024-08-30↗
- AC 25.901-1Safety Assessment of Powerplant InstallationsCurrent2024-08-30↗
- AC 25.933-1Unwanted In-Flight Thrust Reversal of Turbojet Thrust ReversersCurrent2024-08-30↗
- AC 20-154AGuide for Developing a Receiving Inspection System for Aircraft Parts and MaterialsCurrent2024-07-03↗
- AC 20-158BThe Certification of Aircraft Electrical and Electronic Systems for Operation in the High-Intensity Radiated Fields (HIRF) EnvironmentCurrent2024-05-20↗
- AC 20-186AAirworthiness and Operational Approval of Cockpit Voice Recorder SystemsCurrent2024-05-06↗
- AC 20-29CApproval and Use of Fuel System Icing Inhibitors (FSII)Current2024-03-27↗
- AC 20-193Use of Multi-Core ProcessorsCurrent2024-01-08↗
- AC 20-105CReciprocating Engine Power-Loss Accident Prevention and Trend MonitoringCurrent2023-12-18↗
- AC 20-109BService Difficulty Reporting System (Air Operator/Air Agency/General Aviation/Unmanned Aircraft Systems)Current2023-11-01↗
- AC 25.795-10Installation of Physical Secondary Barriers for Transport Category AirplanesCurrent2023-06-27↗
- AC 25.353-1Rudder Control Reversal ConditionsCurrent2022-11-28↗
- AC 20-152ADevelopment Assurance for Airborne Electronic HardwareCurrent2022-10-07↗
- AC 20-189Management of Open Problem Reports (OPRs)Current2022-09-16↗
- AC 20-185AAirworthiness Approval of Synthetic Vision Systems, Synthetic Vision Guidance Systems and Aircraft State Awareness Synthetic Vision SystemsCurrent2021-01-27↗
- AC 20-144AFAA Approval of Electrical Firing Cartridge Components in an Aircraft Fire Extinguishing or Suppression SystemCurrent2018-10-11↗
- AC 20-162BAirworthiness Approval of Installed Radio Frequency Identification (RFID) Tags and SensorsCurrent2018-10-11↗
- AC 20-53CProtection of Aircraft Fuel Systems Against Vapor Ignition Caused by LightningCurrent2018-09-24↗
- AC 25.954-1Transport Airplane Fuel System Lightning ProtectionCurrent2018-09-24↗
- AC 25.981-1DFuel Tank Ignition Source Prevention GuidelinesCurrent2018-09-24↗
- AC 20-62EEligibility, Quality, & Identification of Aeronautical Replacement PartsCurrent2018-09-14↗
- AC 20-190Aircraft Electromagnetic Compatibility CertificationCurrent2018-06-25↗
- AC 25-7DFlight Test Guide for Certification of Transport Category Airplanes Including Change 1Current2018-05-04↗
- AC 20-115DAirborne Software Development Assurance Using EUROCAE ED-12( ) and RTCA DO-178( )Current2017-07-21↗
- AC 20-151CAirworthiness Approval of Traffic Alert and Collision Avoidance Systems (TCAS II), Versions 7.0 & 7.1 and Associated Mode S TranspondersCurrent2017-07-21↗
- AC 20-164ADesigning and Demonstrating Aircraft Tolerance to Portable Electronic DevicesCurrent2017-06-09↗
- AC 20-188Compatibility of Changes to Type Design Installed on AircraftCurrent2016-12-09↗
- AC 20-182AAirworthiness Approval for Aircraft Weather Radar SystemsCurrent2016-10-01↗
- AC 20-140CGuidelines for Design Approval of Aircraft Data Link Communication Systems Supporting Air Traffic Services (ATS)Current2016-09-28↗
- AC 20-160AOnboard Recording of Controller Pilot Data Link Communication (CPDLC) In Crash Survivable MemoryCurrent2016-09-28↗
- AC 25.975-1Fuel Vent Fire ProtectionCurrent2016-06-24↗
- AC 20-153BAcceptance of Aeronautical Data Processes and Associated DatabasesCurrent2016-04-19↗
- AC 25.851-1Built-in Fire Extinguishing/Suppression Systems in Class C and Class F Cargo CompartmentsCurrent2016-02-03↗
- AC 25.857-1Class B and F Cargo CompartmentsCurrent2016-02-03↗
- AC 20-77BUse of Manufacturers’ Maintenance ManualsCurrent2016-01-04↗
- AC 25-31Takeoff Performance Data for Operations on Contaminated RunwaysCurrent2015-12-22↗
- AC 25-32Landing Performance Data for Time-of-Arrival Landing Performance AssessmentsCurrent2015-12-22↗
- AC 20-149BInstallation Guidance for Domestic Flight Information Service- BroadcastCurrent2015-12-21↗
- AC 20-165BAirworthiness Approval of Automatic Dependent Surveillance - Broadcast OUT SystemsCurrent2015-12-07↗
- AC 20-184Guidance on Testing and Installation of Rechargeable Lithium Battery and Battery Systems on AircraftCurrent2015-10-15↗
- AC 20-18BQualification Testing of Turbojet and Turbofan Engine Thrust ReversersCurrent2015-07-07↗
- AC 20-172BAirworthiness Approval for ADS-B In Systems and ApplicationsCurrent2015-05-20↗
- AC 20-150BAirworthiness Approval of Satellite Voice (SATVOICE) Equipment Supporting Air Traffic Service (ATS) CommunicationCurrent2014-12-23↗
- AC 20-183Laser Airworthiness Installation GuidanceCurrent2014-12-15↗
+ 296 more on the FAA index
Recent Federal Register activity
The last 25 of 1,366 Federal Register documents that touch 14 CFR Part 25, newest first.
- 2026-04-20RuleSpecial Condition: Airworthy Inc., Airbus SAS, Model A330-300 Series Airplanes; Installation of a Crew Rest ModuleRead →
- 2026-04-16RuleSpecial Conditions: Honeywell International Inc., Boeing Model 757-200, 757-200PF, 757-200CB, and 757-300 Airplanes; Non-Rechargeable Lithium Batteries and Battery System InstallationRead →
- 2026-04-16RuleSpecial Conditions: ALOFT AeroArchitects, Gulfstream Aerospace Corporation Model G-IV, GIV-X, GV, and GV-SP Airplanes; Rechargeable Lithium Batteries and Battery System InstallationsRead →
- 2026-03-18RuleSpecial Conditions: Textron Aviation Inc. (Textron) Model MU-300-10, 400, 400A Airplanes; Rechargeable Lithium Batteries and Battery System InstallationsRead →
- 2026-03-17RuleSpecial Conditions: Gulfstream Aerospace Corporation Model G300 Airplane; Therapeutic Oxygen SystemRead →
- 2025-12-08RuleSpecial Conditions: Airbus Models A321 neo ACF and A321 neo XLR; Single-Occupant Oblique Seats With Pretensioner Restraint Systems; CorrectionRead →
- 2025-09-23RuleSpecial Conditions: H4 Aerospace (UK) Ltd, The Boeing Company Model 757-200 Series Airplane; Seats With Non-Traditional, Large, Non-Metallic PanelsRead →
- 2025-08-27RuleSpecial Conditions: Gulfstream Aerospace Corporation, Model GVII-G400 Airplane; Automatic Speed Protection for Design Dive Speed (Dive Speed Definition)Read →
- 2025-08-22RuleSpecial Conditions: Dassault Aviation Model Falcon 10X Airplane; Limit Pilot ForcesRead →
- 2025-08-15RuleSpecial Conditions: Jet Aviation AG, Gulfstream Aerospace Corporation Model GVI Airplane; Installation of Therapeutic Oxygen SystemRead →
- 2025-06-13RuleSpecial Conditions: The Boeing Company, Boeing Model 747-8 Series Airplane; Short-Term Occupancy of Lower Lobe During Flight and Installation of Stairway Between Main Deck and Lower-LobeRead →
- 2025-06-04RuleSpecial Conditions: Delta Flight Products, Non-Rechargeable Lithium Batteries and Battery System InstallationsRead →
- 2025-05-23RuleSpecial Conditions: The Boeing Company Model 777-9 Airplane; Operation Without Normal Electrical PowerRead →
- 2025-05-05RuleSpecial Conditions: Archeion Holdings LLC, Boeing Model 747-400/-400D/ -400F Series Airplanes; Electronic System Security Protection From Unauthorized External AccessRead →
- 2025-03-20RuleSpecial Conditions: Canard Aerospace Corporation, DeHavilland Model DHC-8-400 Series Airplane; Electronic System Security Protection From Unauthorized External AccessRead →
- 2025-03-05RuleSpecial Conditions: Universal Avionics; Electronic System Security Protection From Unauthorized External AccessRead →
- 2025-02-05RuleSpecial Conditions: Airbus Model A321neo ACF and A321neo XLR Series Airplanes; Dynamic Test Requirements for Single Occupant Oblique Seats at an Installation Angle of 49 Degrees With Airbags and 3-Point Restraint or Pretensioner Restraint SystemsRead →
- 2025-02-04NPRMSpecial Conditions: Gulfstream Aerospace Corporation, Model GVII-G400 Airplane; Automatic Speed Protection for Design Dive Speed (Dive Speed Definition)Read →
- 2024-12-23NPRMSpecial Conditions: Airbus Model A321 neo ACF and A321 neo XLR Series Airplanes; Dynamic Test Requirements for Single Occupant Oblique Seats at an Installation Angle of 49 Degrees With Airbags and 3-Point Restraint or Pretensioner Restraint SystemsRead →
- 2024-12-13RuleSpecial Conditions: Airbus Models A321 neo ACF and A321 neo XLR; Single-Occupant Oblique Seats With Pretensioner Restraint SystemsRead →
- 2024-12-13RuleSpecial Conditions: Aerocon Engineering Company, Airbus Model A350-941 Airplane; Forward Lower Lobe Crew Rest Compartment InstallationRead →
- 2024-11-29NPRMSpecial Conditions: The Boeing Company, Boeing Model 747-8 Series Airplane; Short-Term Occupancy of Lower Lobe During Flight and Installation of Stairway Between Main Deck and Lower-LobeRead →
- 2024-11-21RuleSpecial Conditions: Gulfstream Aerospace Corporation, Model GVII-G400 Airplane; Installation of a Therapeutic Oxygen System for Medical UseRead →
- 2024-10-17RuleSpecial Conditions: Northwest Aerospace Technologies, Inc (NAT), Boeing Model 787-9 Airplane; Installation of High Wall SuitesRead →
- 2024-10-08RuleModernization of Passenger Information Requirements Relating to “No Smoking” Sign Illumination; Correction; Confirmation of Effective DateRead →
+ 1,341 more on federalregister.gov