Airplane boneyard storage, scrapping, salvage, dismantling ...
https://airplaneboneyards.com/airplane-boneyard-reclamation...For example, a Boeing 747 has 6 million parts, 170 miles of wiring and 147,000 pounds of aluminum. A plane to be scrapped first has its hazardous, toxic and radioactive materials removed, such as fuel, oil, hydraulic fluids, de-icing liquids, and batteries.