Televised and cleaned all underground ductwork. Excavated area in downstairs living room to expose rusted pipe that was collapsed. Repaired ductwork with new metal ductwork. Backfilled area with stone and concrete. Applied trenchless spincast mortar to all underground connections and elbows. 6/10/25 Applied first application of duct armor to all underground ductwork and furnace box. 6/17/25 Applied second application of duct armor to all underground ductwork and furnace box.