(1)
[Impact witha 4-pound bird when the velocity of the airplane relative to the bird along the airplane’s .ight path is equal to VC at sea level or 0.85VC at 8,000 feet, whichever is more critical;]

(2)
Uncontained fan blade impact;

′
Elodie Roux. Septembre 2003
Subpart C : Structure
(3)
Uncontained engine failure; or

(4)
Uncontained high energy rotating machinery failure. Thedamaged structure mustbe able to withstand the staticloads(considered as ultimate loads) which are reasonably expected to occur on the .ight. Dynamic e.ects on these static loads need not be considered. Corrective action to be taken bythepilotfollowingtheincident, suchaslimiting maneuvers, avoidingturbulence, and reducing speed, mustbe considered.If signi.cant changesin structural sti.ness

or geometry, or both, follow from a structural failure or partial failure, the e.ect on damage tolerance must be further investigated.
Amdt. 25-96, E.. 3/31/98
FAR25.573 :[Reserved.]
[Reserved.] Amdt. 25-45, E.. 12/1/78
46.10 Lightning Protection
FAR25.581 :[Lightningprotection.]
(a)
[The airplane must be protectedagainst catastrophic e.ects from lightning.

(b)
For metallic components, compliance with paragraph (a) of this section may be shown by–

(1)
Bonding the components properly to the airframe; or

(2)
Designing the components so that a strike will not endanger the airplane.

(c)
For nonmetallic components, compliance withparagraph(a) ofthis section may be shown by–

(1)
Designing the components to minimize the e.ect of a strike; or

(2)
Incorporating acceptable means of diverting the resulting electrical current so as not to endanger the airplane.]

Amdt. 25-23, E.. 5/8/70
Chapitre 47
Subpart D : Design and Construction
Sommaire
47.1General ............................... 568

FAR25.601:General. ...................... 568 FAR25.603:Materials. ..................... 568 FAR25.605:Fabricationmethods. . . . . . . . . . . . . . . 568 FAR25.607:[Fasteners.] .................... 568 FAR25.609:Protectionof structure. . . . . . . . . . . . . . 569 FAR25.611:[Accessibilityprovisions.] . . . . . . . . . . . . 569 FAR 25.613 : Material strength properties and design values. 569 FAR25.615:[Removed.] .................... 570 FAR25.619:Specialfactors. .................. 570 FAR25.621:Castingfactors. ................. 570 FAR25.623:Bearingfactors. ................. 571 FAR25.625:Fittingfactors. .................. 571 FAR25.629:[Aeroelasticstability requirements.] . . . . . . 572 FAR25.631:[Bird strikedamage.] . . . . . . . . . . . . . . 573
47.2ControlSurfaces .......................... 574

FAR25.651:Proof of strength. . . . . . . . . . . . . . . . . 574 FAR25.655:Installation. ................... 574 FAR25.657:Hinges. ...................... 574
47.3ControlSystems .......................... 574

FAR25.671:General. ...................... 574 FAR25.672:[Stability augmentation and automatic andpower-operated systems.] .................. 575 FAR25.673:[Removed.] .................... 576 FAR25.675:Stops. ....................... 576 FAR25.677:Trimsystems. .................. 576 FAR 25.679 : Control system gust locks. . . . . . . . . . . . 576 FAR25.681:Limitload statictests. . . . . . . . . . . . . . 577 FAR25.683:Operationtests. ................. 577 FAR25.685:Control systemdetails. . . . . . . . . . . . . . 577
565
Subpart D : Design and Construction
FAR25.689:Cablesystems. .................. 577 FAR25.693:Joints. ....................... 578 FAR25.695:[Revoked.] .................... 578 FAR 25.697 : Lift and drag devices, controls. . . . . . . . . . 578 FAR25.699:[Liftanddragdeviceindicator.] . . . . . . . . 579 FAR25.701:[Flap and slatinterconnection.] . . . . . . . . . 579 FAR25.703:[Takeo.warning system.] . . . . . . . . . . . . 579
　
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