Title 14--Aeronautics and Space
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 25--AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
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 | 25.1 |
Applicability. |
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| 25.2 |
Special retroactive requirements. |
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| 25.21 |
Proof of compliance. |
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| 25.23 |
Load distribution limits. |
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| 25.25 |
Weight limits. |
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| 25.27 |
Center of gravity limits. |
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| 25.29 |
Empty weight and corresponding center of gravity. |
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| 25.31 |
Removable ballast. |
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| 25.33 |
Propeller speed and pitch limits. |
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| 25.101 |
General.
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| 25.103 |
Stalling speed. |
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| 25.105 |
Takeoff.
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| 25.107 |
Takeoff speeds.
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| 25.109 |
Accelerate-stop distance.
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| 25.111 |
Takeoff path.
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| 25.113 |
Takeoff distance and takeoff run.
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| 25.115 |
Takeoff flight path.
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| 25.117 |
Climb: general. |
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| 25.119 |
Landing climb: All-engines-operating.
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| 25.121 |
Climb: One-engine-inoperative. |
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| 25.123 |
En route flight paths. |
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| 25.125 |
Landing. |
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| 25.143 |
General. |
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| 25.145 |
Longitudinal control.
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| 25.147 |
Directional and lateral control. |
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| 25.149 |
Minimum control speed. |
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| 25.161 |
Trim. |
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| 25.171 |
General. |
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| 25.173 |
Static longitudinal stability. |
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| 25.175 |
Demonstration of static longitudinal stability. |
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| 25.177 |
Static lateral-directional stability. |
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| 25.181 |
Dynamic stability. |
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| 25.201 |
Stall demonstration. |
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| 25.203 |
Stall characteristics. |
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| 25.207 |
Stall warning. |
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| 25.231 |
Longitudinal stability and control. |
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| 25.233 |
Directional stability and control.
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| 25.235 |
Taxiing condition. |
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| 25.237 |
Wind velocities. |
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| 25.239 |
Spray characteristics, control, and stability on water. |
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| 25.251 |
Vibration and buffeting. |
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| 25.253 |
High-speed characteristics. |
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| 25.255 |
Out-of-trim characteristics. |
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| 25.301 |
Loads. |
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| 25.303 |
Factor of safety. |
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| 25.305 |
Strength and deformation. |
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| 25.307 |
Proof of structure. |
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| 25.321 |
General. |
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| 25.331 |
Symmetric maneuvering conditions. |
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| 25.333 |
Flight maneuvering envelope. |
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| 25.335 |
Design airspeeds. |
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| 25.337 |
Limit maneuvering load factors. |
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| 25.341 |
Gust and turbulence loads. |
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| 25.343 |
Design fuel and oil loads. |
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| 25.345 |
High lift devices. |
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| 25.349 |
Rolling conditions.
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| 25.351 |
Yaw maneuver conditions. |
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| 25.361 |
Engine torque. |
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| 25.363 |
Side load on engine and auxiliary power unit mounts. |
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| 25.365 |
Pressurized compartment loads. |
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| 25.367 |
Unsymmetrical loads due to engine failure. |
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| 25.371 |
Gyroscopic loads. |
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| 25.373 |
Speed control devices. |
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| 25.391 |
Control surface loads: General. |
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| 25.393 |
Loads parallel to hinge line. |
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| 25.395 |
Control system. |
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| 25.397 |
Control system loads. |
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| 25.399 |
Dual control system. |
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| 25.405 |
Secondary control system. |
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| 25.407 |
Trim tab effects. |
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| 25.409 |
Tabs. |
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| 25.415 |
Ground gust conditions. |
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| 25.427 |
Unsymmetrical loads. |
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| 25.445 |
Auxiliary aerodynamic surfaces. |
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| 25.457 |
Wing flaps. |
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| 25.459 |
Special devices. |
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| 25.471 |
General. |
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| 25.473 |
Landing load conditions and assumptions. |
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| 25.477 |
Landing gear arrangement. |
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| 25.479 |
Level landing conditions. |
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| 25.481 |
Tail-down landing conditions.
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| 25.483 |
One-gear landing conditions. |
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| 25.485 |
Side load conditions.
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| 25.487 |
Rebound landing condition. |
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| 25.489 |
Ground handling conditions. |
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| 25.491 |
Taxi, takeoff and landing roll. |
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| 25.493 |
Braked roll conditions.
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| 25.495 |
Turning. |
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| 25.497 |
Tail-wheel yawing. |
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| 25.499 |
Nose-wheel yaw and steering. |
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| 25.503 |
Pivoting. |
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| 25.507 |
Reversed braking. |
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| 25.509 |
Towing loads. |
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| 25.511 |
Ground load: unsymmetrical loads on multiple-wheel units. |
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| 25.519 |
Jacking and tie-down provisions. |
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| 25.521 |
General. |
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| 25.523 |
Design weights and center of gravity positions. |
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| 25.525 |
Application of loads. |
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| 25.527 |
Hull and main float load factors. |
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| 25.529 |
Hull and main float landing conditions. |
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| 25.531 |
Hull and main float takeoff condition. |
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| 25.533 |
Hull and main float bottom pressures. |
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| 25.535 |
Auxiliary float loads. |
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| 25.537 |
Seawing loads. |
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| 25.561 |
General. |
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| 25.562 |
Emergency landing dynamic conditions. |
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| 25.563 |
Structural ditching provisions. |
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| 25.571 |
Damage--tolerance and fatigue evaluation of structure.
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| 25.581 |
Lightning protection. |
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| 25.601 |
General. |
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| 25.603 |
Materials. |
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| 25.605 |
Fabrication methods. |
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| 25.607 |
Fasteners. |
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| 25.609 |
Protection of structure. |
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| 25.611 |
Accessibility provisions. |
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| 25.613 |
Material strength properties and design values. |
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| 25.619 |
Special factors. |
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| 25.621 |
Casting factors. |
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| 25.623 |
Bearing factors. |
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| 25.625 |
Fitting factors. |
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| 25.629 |
Aeroelastic stability requirements. |
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| 25.631 |
Bird strike damage. |
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| 25.651 |
Proof of strength. |
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| 25.655 |
Installation. |
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| 25.657 |
Hinges. |
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| 25.671 |
General. |
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| 25.672 |
Stability augmentation and automatic and power-operated systems. |
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| 25.675 |
Stops. |
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| 25.677 |
Trim systems. |
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| 25.679 |
Control system gust locks. |
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| 25.681 |
Limit load static tests. |
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| 25.683 |
Operation tests. |
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| 25.685 |
Control system details. |
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| 25.689 |
Cable systems. |
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| 25.693 |
Joints. |
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| 25.697 |
Lift and drag devices, controls. |
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| 25.699 |
Lift and drag device indicator. |
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| 25.701 |
Flap and slat interconnection. |
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| 25.703 |
Takeoff warning system. |
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| 25.721 |
General. |
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| 25.723 |
Shock absorption tests. |
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| 25.725 |
Limit drop tests. |
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| 25.727 |
Reserve energy absorption drop tests. |
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| 25.729 |
Retracting mechanism. |
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| 25.731 |
Wheels. |
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| 25.733 |
Tires. |
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| 25.735 |
Brakes.
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| 25.737 |
Skis. |
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| 25.751 |
Main float buoyancy. |
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| 25.753 |
Main float design. |
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| 25.755 |
Hulls. |
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| 25.771 |
Pilot compartment. |
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| 25.772 |
Pilot compartment doors. |
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| 25.773 |
Pilot compartment view. |
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| 25.775 |
Windshields and windows. |
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| 25.777 |
Cockpit controls. |
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| 25.779 |
Motion and effect of cockpit controls. |
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| 25.783 |
Doors. |
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| 25.785 |
Seats, berths, safety belts, and harnesses. |
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| 25.787 |
Stowage compartments. |
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| 25.789 |
Retention of items of mass in passenger and crew compartments and galleys. |
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| 25.791 |
Passenger information signs and placards. |
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| 25.793 |
Floor surfaces. |
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| 25.801 |
Ditching. |
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| 25.803 |
Emergency evacuation. |
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| 25.807 |
Emergency exits.
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| 25.809 |
Emergency exit arrangement. |
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| 25.810 |
Emergency egress assist means and escape routes. |
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| 25.811 |
Emergency exit marking. |
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| 25.812 |
Emergency lighting. |
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| 25.813 |
Emergency exit access. |
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| 25.815 |
Width of aisle. |
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| 25.817 |
Maximum number of seats abreast. |
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| 25.819 |
Lower deck service compartments (including galleys). |
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| 25.831 |
Ventilation. |
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| 25.832 |
Cabin ozone concentration.
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| 25.833 |
Combustion heating systems. |
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| 25.841 |
Pressurized cabins. |
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| 25.843 |
Tests for pressurized cabins. |
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| 25.851 |
Fire extinguishers. |
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| 25.853 |
Compartment interiors. |
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| 25.854 |
Lavatory fire protection. |
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| 25.855 |
Cargo or baggage compartments.
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| 25.857 |
Cargo compartment classification.
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| 25.858
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Cargo or baggage compartment smoke or fire detection systems.
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| 25.859 |
Combustion heater fire protection. |
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| 25.863 |
Flammable fluid fire protection. |
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| 25.865 |
Fire protection of flight controls, engine mounts, and other flight structure. |
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| 25.867 |
Fire protection: other components. |
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| 25.869 |
Fire protection: systems. |
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| 25.871 |
Leveling means. |
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| 25.875 |
Reinforcement near propellers. |
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| 25.901 |
Installation. |
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| 25.903 |
Engines.
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| 25.904 |
Automatic takeoff thrust control system (ATTCS). |
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| 25.905 |
Propellers. |
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| 25.907 |
Propeller vibration. |
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| 25.925 |
Propeller clearance. |
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| 25.929 |
Propeller deicing. |
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| 25.933 |
Reversing systems. |
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| 25.934 |
Turbojet engine thrust reverser system tests. |
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| 25.937 |
Turbopropeller-drag limiting systems. |
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| 25.939 |
Turbine engine operating characteristics. |
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| 25.941 |
Inlet, engine, and exhaust compatibility. |
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| 25.943 |
Negative acceleration. |
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| 25.945 |
Thrust or power augmentation system. |
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| 25.951 |
General. |
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| 25.952 |
Fuel system analysis and test. |
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| 25.953 |
Fuel system independence. |
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| 25.954 |
Fuel system lightning protection. |
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| 25.955 |
Fuel flow. |
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| 25.957 |
Flow between interconnected tanks. |
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| 25.959 |
Unusable fuel supply. |
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| 25.961 |
Fuel system hot weather operation. |
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| 25.963 |
Fuel tanks: general. |
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| 25.965 |
Fuel tank tests. |
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| 25.967 |
Fuel tank installations. |
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| 25.969 |
Fuel tank expansion space. |
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| 25.971 |
Fuel tank sump. |
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| 25.973 |
Fuel tank filler connection. |
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| 25.975 |
Fuel tank vents and carburetor vapor vents. |
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| 25.977 |
Fuel tank outlet. |
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| 25.979 |
Pressure fueling system. |
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| 25.981 |
Fuel tank temperature. |
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| 25.991 |
Fuel pumps. |
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| 25.993 |
Fuel system lines and fittings. |
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| 25.994 |
Fuel system components. |
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| 25.995 |
Fuel valves. |
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| 25.997 |
Fuel strainer or filter. |
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| 25.999 |
Fuel system drains. |
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| 25.1001 |
Fuel jettisoning system. |
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| 25.1011 |
General. |
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| 25.1013 |
Oil tanks. |
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| 25.1015 |
Oil tank tests. |
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| 25.1017 |
Oil lines and fittings. |
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| 25.1019 |
Oil strainer or filter. |
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| 25.1021 |
Oil system drains. |
|
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| 25.1023 |
Oil radiators. |
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| 25.1025 |
Oil valves. |
|
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| 25.1027 |
Propeller feathering system. |
|
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| 25.1041 |
General. |
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| 25.1043 |
Cooling tests. |
|
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| 25.1045 |
Cooling test procedures. |
|
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| 25.1091 |
Air induction. |
|
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| 25.1093 |
Induction system icing protection. |
|
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| 25.1101 |
Carburetor air preheater design. |
|
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| 25.1103 |
Induction system ducts and air duct systems. |
|
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| 25.1105 |
Induction system screens. |
|
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| 25.1107 |
Inter-coolers and after-coolers. |
|
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| 25.1121 |
General. |
|
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| 25.1123 |
Exhaust piping. |
|
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| 25.1125 |
Exhaust heat exchangers. |
|
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| 25.1127 |
Exhaust driven turbo-superchargers. |
|
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| 25.1141 |
Powerplant controls: general. |
|
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| 25.1142 |
Auxiliary power unit controls. |
|
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| 25.1143 |
Engine controls. |
|
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| 25.1145 |
Ignition switches. |
|
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| 25.1147 |
Mixture controls. |
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