§25.581 Lightning protection

(See AMC 25.581) (a) The aeroplane must be protected against catastrophic effects from lightning. (See CS 25.899 and AMC 25.581.) (b) For metallic components, compliance with sub-paragraph (a) of this paragraph 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 aeroplane. (c) For non-metallic components, compliance with sub-paragraph (a) of this paragraph may be shown by – (1) Designing the components to minimise the effect of a strike; or (2) Incorporating acceptable means of diverting the resulting electrical current so as not to endanger the aeroplane.