Photos document a lint-packed roof dryer termination and heavy dust and adhered deposits inside return and supply duct sections. The crew opened the system, connected truck-mounted negative suction, and mechanically agitated accessible branches so loosened material could be collected. The after views show less loose dust in photographed duct sections, a cleared roof termination, and the roof penetration resealed around the dryer exhaust. Staining, overspray, and corrosion remain visible in some areas.