"Kevin Horton" wrote in message (1) Some composites are susceptible to
lightning damage, and do not
dissipate Pstatic electrical charges or provide electromagnetic shielding.
Therefore it should be demonstrated by analysis support by test evidence
that the structure can dissipate P-static electrical charges, provides
electromagnetic protection where required and provides an acceptable
means
of diverting the resulting electrical current (as a result of a lightning
strike) so as not to endanger the aircraft.

(2) Consideration should be given possible deterioration and undetected
damage to the lightning protection system.

That spells out the requirements. Other than the thin copper mesh already
mentioned, how are manufacturers meeting these requirements?

D.