Structural Inspection and Damage Analysis
What this domain tests
Inspection questions test whether you can find all the damage, not just the obvious hit, and turn those findings into a repair plan. Damage analysis is energy analysis: force enters at the impact point (direct damage) and travels through the structure along load paths, producing indirect damage at kinks, joints, and mounting points far from the bumper.
Core rules
- Direct damage is where force was applied. Indirect damage is displacement elsewhere, typically where the section changes: a rail bend, a body mount, a shock tower.
- Classify what you see: bend, kink (a sharp, work-hardened fold), mash, diamond (crossmembers pushed out of square), sag, and twist. Each classification drives a different anchoring and pulling strategy.
- Follow a fixed order: pre-repair scan, visual inspection with trim and panels removed, then measurement. Measurement confirms what the eye cannot see.
- Inspect weld integrity (failed spot welds, separated adhesive, cracked seam sealer) and evidence of prior repairs, because both change the plan.
- Record gaps and flushness at every adjacent panel before and after pulling.
Worked example
A rear offset impact shows obvious quarter panel and bumper damage. The reasoning step is to follow the load path forward to the rear rail, wheelhouse, floor, and rear suspension pickup points. If the deck lid gap is uneven and the rail reference point is out of tolerance, the rail has moved. That finding, not the visible sheet metal, sets the anchoring and measuring plan before any panel is replaced.
Traps that cost marks
Treating bumper and trim damage as cosmetic; missing welds hidden under seam sealer or undercoating; skipping the pre-repair scan; assuming a car that looks straight is within tolerance; inspecting only the impact side and not the opposite corner for twist.