How do you analyze and certify structures for discrete source damage scenarios?

Discrete source damage (DSD) scenarios include: Tire burst (fragments impacting structure), Engine burst (uncontained rotor failure), Bird strike, and Lightning strike. Analysis approach: Define damage scenarios per regulations (AC 25.905 for engine burst, AC 25.571 for tire), Determine fragment trajectories and impact energy, Assess penetration and damage extent using explicit dynamics or empirical methods, Analyze residual strength and get-home capability with assumed damage, and Define inspection and operational limitations. Structure must sustain continued safe flight loads after DSD. Testing may include panel penetration tests, full-scale tire burst tests, and engine blade containment tests. Results define damage zones and required protection or structural reinforcement.