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Federal Aviation Administration, DOT § 25.149

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Federal Aviation Administration, DOT § 25.149 Federal Aviation Administration, DOT Pt. 25 applicable wear tolerances, and work rec- be included in the principal manual. This ommended at these periods. However, the ap- section must contain a legible statement in plicant may refer to an accessory, instru- a prominent location that reads ‘‘The Air- ment, or equipment manufacturer as the worthiness Limitations section is FAA ap- source of this information if the applicant proved and specifies maintenance required shows that the item has an exceptionally under §§ 43.16 and 91.403 of Title 14 of the Code high degree of complexity requiring special- of Federal Regulations unless an alternative ized maintenance techniques, test equip- program has been FAA approved.’’ ment, or expertise. The recommended over- haul periods and necessary cross reference to the Airworthiness Limitations section of the PART 25—AIRWORTHINESS STAND- manual must also be included. In addition, ARDS: TRANSPORT CATEGORY the applicant must include an inspection AIRPLANES program that includes the frequency and ex- tent of the inspections necessary to provide SPECIAL FEDERAL AVIATION REGULATION NO. for the continued airworthiness of the air- 13 plane. SPECIAL FEDERAL AVIATION REGULATION NO. (2) Troubleshooting information describing 109 probable malfunctions, how to recognize those malfunctions, and the remedial action for those malfunctions. Subpart A—General (3) Information describing the order and Sec. method of removing and replacing products 25.1 Applicability. and parts with any necessary precautions to 25.2 Special retroactive requirements. be taken. 25.3 Special provisions for ETOPS type de- (4) Other general procedural instructions sign approvals. including procedures for system testing dur- 25.5 Incorporations by reference. ing ground running, symmetry checks, weighing and determining the center of grav- Subpart B—Flight ity, lifting and shoring, and storage limita- tions. GENERAL (c) Diagrams of structural access plates 25.21 Proof of compliance. and information needed to gain access for in- 25.23 Load distribution limits. spections when access plates are not pro- 25.25 Weight limits. vided. 25.27 Center of gravity limits. (d) Details for the application of special in- 25.29 Empty weight and corresponding cen- spection techniques including radiographic ter of gravity. and ultrasonic testing where such processes 25.31 Removable ballast. are specified by the applicant. 25.33 Propeller speed and pitch limits. (e) Information needed to apply protective treatments to the structure after inspection. PERFORMANCE (f) All data relative to structural fasteners such as identification, discard recommenda- 25.101 General. tions, and torque values. 25.103 Stall speed. (g) A list of special tools needed. 25.105 Takeoff. (h) In addition, for level 4 airplanes, the 25.107 Takeoff speeds. following information must be furnished— 25.109 Accelerate-stop distance. (1) Electrical loads applicable to the var- 25.111 Takeoff path. ious systems; 25.113 Takeoff distance and takeoff run. (2) Methods of balancing control surfaces; 25.115 Takeoff flight path. (3) Identification of primary and secondary 25.117 Climb: general. structures; and 25.119 Landing climb: All-engines-operating. (4) Special repair methods applicable to 25.121 Climb: One-engine-inoperative. the airplane. 25.123 En route flight paths. 25.125 Landing. A23.4 Airworthiness limitations section. CONTROLLABILITY AND MANEUVERABILITY The Instructions for Continued Airworthi- ness must contain a section titled Airworthi- 25.143 General. ness Limitations that is segregated and 25.145 Longitudinal control. clearly distinguishable from the rest of the 25.147 Directional and lateral control. document. This section must set forth each 25.149 Minimum control speed. mandatory replacement time, structural in- TRIM spection interval, and related structural in- spection procedure required for type certifi- 25.161 Trim. cation. If the Instructions for Continued Air- STABILITY worthiness consist of multiple documents, the section required by this paragraph must 25.171 General. 195 VerDate Sep<11>2014 09:25 Sep 07, 2021 Jkt 253046 PO 00000 Frm 00205 Fmt 8010 Sfmt 8010 Y:\SGML\253046.XXX 253046 Pt. 25 14 CFR Ch. I (1–1–21 Edition) 25.173 Static longitudinal stability. 25.405 Secondary control system. 25.175 Demonstration of static longitudinal 25.407 Trim tab effects. stability. 25.409 Tabs. 25.177 Static lateral-directional stability. 25.415 Ground gust conditions. 25.181 Dynamic stability. 25.427 Unsymmetrical loads. 25.445 Auxiliary aerodynamic surfaces. STALLS 25.457 Wing flaps. 25.201 Stall demonstration. 25.459 Special devices. 25.203 Stall characteristics. GROUND LOADS 25.207 Stall warning. 25.471 General. GROUND AND WATER HANDLING 25.473 Landing load conditions and assump- CHARACTERISTICS tions. 25.231 Longitudinal stability and control. 25.477 Landing gear arrangement. 25.233 Directional stability and control. 25.479 Level landing conditions. 25.235 Taxiing condition. 25.481 Tail-down landing conditions. 25.237 Wind velocities. 25.483 One-gear landing conditions. 25.239 Spray characteristics, control, and 25.485 Side load conditions. stability on water. 25.487 Rebound landing condition. 25.489 Ground handling conditions. MISCELLANEOUS FLIGHT REQUIREMENTS 25.491 Taxi, takeoff and landing roll. 25.251 Vibration and buffeting. 25.493 Braked roll conditions. 25.253 High-speed characteristics. 25.495 Turning. 25.255 Out-of-trim characteristics. 25.497 Tail-wheel yawing. 25.499 Nose-wheel yaw and steering. Subpart C—Structure 25.503 Pivoting. 25.507 Reversed braking. GENERAL 25.509 Towing loads. 25.511 Ground load: unsymmetrical loads on 25.301 Loads. multiple-wheel units. 25.303 Factor of safety. 25.519 Jacking and tie-down provisions. 25.305 Strength and deformation. 25.307 Proof of structure. WATER LOADS FLIGHT LOADS 25.521 General. 25.523 Design weights and center of gravity 25.321 General. positions. FLIGHT MANEUVER AND GUST CONDITIONS 25.525 Application of loads. 25.527 Hull and main float load factors. 25.331 Symmetric maneuvering conditions. 25.529 Hull and main float landing condi- 25.333 Flight maneuvering envelope. tions. 25.335 Design airspeeds. 25.531 Hull and main float takeoff condi- 25.337 Limit maneuvering load factors. tion. 25.341 Gust and turbulence loads. 25.533 Hull and main float bottom pressures. 25.343 Design fuel and oil loads. 25.535 Auxiliary float loads. 25.345 High lift devices. 25.537 Seawing loads. 25.349 Rolling conditions. 25.351 Yaw maneuver conditions. EMERGENCY LANDING CONDITIONS SUPPLEMENTARY CONDITIONS 25.561 General. 25.562 Emergency landing dynamic condi- 25.361 Engine and auxiliary power unit tions. torque. 25.563 Structural ditching provisions. 25.362 Engine failure loads. 25.363 Side load on engine and auxiliary FATIGUE EVALUATION power unit mounts. 25.365 Pressurized compartment loads. 25.571 Damage—tolerance and fatigue eval- 25.367 Unsymmetrical loads due to engine uation of structure. failure. LIGHTNING PROTECTION 25.371 Gyroscopic loads. 25.373 Speed control devices. 25.581 Lightning protection. CONTROL SURFACE AND SYSTEM LOADS Subpart D—Design and Construction 25.391 Control surface loads: General. GENERAL 25.393 Loads parallel to hinge line. 25.395 Control system. 25.601 General. 25.397 Control system loads. 25.603 Materials. 25.399 Dual control system. 25.605 Fabrication methods. 196 VerDate Sep<11>2014 09:25 Sep 07, 2021 Jkt 253046 PO 00000 Frm 00206 Fmt 8010 Sfmt 8010 Y:\SGML\253046.XXX 253046 Federal Aviation Administration, DOT Pt. 25 25.607 Fasteners. 25.793 Floor surfaces. 25.609 Protection of structure. 25.795 Security considerations. 25.611 Accessibility provisions. 25.613 Material strength properties and ma- EMERGENCY PROVISIONS terial design values. 25.801 Ditching. 25.619 Special factors. 25.803 Emergency evacuation. 25.621 Casting factors. 25.807 Emergency exits. 25.623 Bearing factors. 25.809 Emergency exit arrangement. 25.625 Fitting factors. 25.810 Emergency egress assist means and 25.629 Aeroelastic stability requirements. escape routes. 25.631 Bird strike damage. 25.811 Emergency exit marking. CONTROL SURFACES 25.812 Emergency lighting. 25.813 Emergency exit access. 25.651 Proof of strength. 25.815 Width of aisle. 25.655 Installation. 25.817 Maximum number of seats abreast. 25.657 Hinges. 25.819 Lower deck service compartments (including galleys). CONTROL SYSTEMS 25.820 Lavatory doors. 25.671 General. 25.672 Stability augmentation and auto- VENTILATION AND HEATING matic and power-operated systems. 25.831 Ventilation. 25.675 Stops. 25.832 Cabin ozone concentration. 25.677 Trim systems. 25.833 Combustion heating systems. 25.679 Control system gust locks. 25.681 Limit load static tests. PRESSURIZATION 25.683 Operation tests. 25.685 Control system details. 25.841 Pressurized cabins. 25.689 Cable systems. 25.843 Tests for pressurized cabins. 25.693 Joints. FIRE PROTECTION 25.697 Lift and drag devices, controls. 25.699 Lift and drag device indicator. 25.851 Fire extinguishers. 25.701 Flap and slat interconnection. 25.853 Compartment interiors. 25.703 Takeoff warning system. 25.854 Lavatory fire protection. 25.855 Cargo or baggage compartments. LANDING GEAR 25.856 Thermal/Acoustic insulation mate- 25.721 General. rials. 25.723 Shock absorption tests. 25.857 Cargo compartment classification. 25.725–25.727 [Reserved] 25.858 Cargo or baggage compartment 25.729 Retracting mechanism. smoke or fire detection systems. 25.731 Wheels. 25.859 Combustion heater fire protection. 25.733 Tires. 25.863 Flammable fluid fire protection. 25.735 Brakes and braking systems. 25.865 Fire protection of flight controls, en- 25.737 Skis. gine mounts, and other flight structure. 25.867 Fire protection: other components. FLOATS AND HULLS 25.869 Fire protection: systems. 25.751 Main float buoyancy. MISCELLANEOUS 25.753 Main float design. 25.755 Hulls. 25.871 Leveling means. 25.875 Reinforcement near propellers. PERSONNEL AND CARGO ACCOMMODATIONS 25.899 Electrical bonding and protection 25.771 Pilot compartment. against static electricity. 25.772 Pilot compartment doors. 25.773 Pilot compartment view. Subpart E—Powerplant 25.775 Windshields and windows. GENERAL 25.777 Cockpit controls.
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