Performed air duct repair service on residential HVAC system. Conducted visual inspection identifying crushed and disconnected ductwork sections causing high static pressure and airflow restrictions. Removed damaged flex duct segments and installed new R8 insulated ducting utilizing proper support strapping. Sealed connections with UL-listed mastic and fiber mesh tape. Replaced multiple duct mounting straps and hangers. Restored balanced airflow through full system following industry best practices. Measured static pressures confirming operation within specified range.