So, we all know what happens to old airplanes when they reach their end of life...beer cans (or so the joke goes).
What about the engines mounted on them? I know that an engine will often outlast the airframe, I even recall reading an Airliners
magazine of the scrapping process of an airliner. In this case, it was an ex-Canadian 732 in which the JT8Ds were built in the late 1960s while the airframe was built in the mid 1970s. After the airframe was scrapped, the engines were simply inspected, loaded up onto pallets, shrink-wrapped, bar-coded, and sent off to a 732 operator in Africa.
So what happens to engines that reach the end of their design life, or are simply uneconomical to run (such as JT3Ds, RR
Conways, etc.)? To further make it complicated, I recall reading that either the GEnx or the PW1000G, was designed to be "highly recycle-able;" does this mean that older engines are simply dumped for trash?