Important to identify location, color, intensity, and time of emissions. Location of witness and environmental background. If time factors are questionable, request simulation or rerun, if possible. If more than a quarter of a turn loose, not the result of a fire. Strands of copper wiring may fuse together and little beads may form on the ends.
Lightning strikes can result in both spark and arc ignition sources within the aircraft.
Both may have sufficient energy to leave thermal evidence. Lightning also may result in hot surface ignition. Static electricity cannot be identified as the probable ignition source until all other possible ignition sources have been eliminated and a charge generating mechanism is identified. Damage pattern generally sporadic and unpredictable insofar as establishing a fire pattern.