Definition
The set of design features and materials built into an aircraft's structure, wiring, and fuel system to safely conduct the electrical energy of a lightning strike across the airframe and back out into the atmosphere without damaging critical systems, igniting fuel, or injuring occupants. In metal aircraft, the conductive skin itself carries most of the current; in composite aircraft, embedded conductive layers (such as metal mesh, foil, or expanded metal screens) are added because composites do not conduct electricity well on their own.
Plain English
Aircraft are built so that if lightning hits them, the electricity flows around the outside of the airframe and exits without harming the people, fuel, or systems inside.
Context Anchor
Seen in aircraft construction discussions, especially when comparing aluminum aircraft with composite aircraft.
Why Pilots Care
Inadequate protection can lead to structural damage, fire, or loss of flight-critical systems during a strike, directly affecting the decision to operate near thunderstorms.
Grounding Statement
If lightning hits an aircraft, the goal is to let the electricity move through a planned path instead of forcing it through weak spots.
Intuition Check
Lightning strike protection does not mean the aircraft cannot be struck by lightning. It means the aircraft is designed to handle a strike with less chance of serious damage.
Example Sentence 1
The composite wing skin includes a fine metal mesh as part of the lightning strike protection system.
Example Sentence 2
Modern composite aircraft require additional lightning strike protection layers to meet certification standards.