For example...
On the manufacturer page, the Boeing 747-200 shows the variant with the GE engine. When you click to buy it, it shows the data and price when equipped with the GE engine, but it displays the PW engine in the drop-down menu.
This also happens with the 747-100, 707-120B, Comet 4, Comet 4B, and Comet 4C.
It doesn't happen with the 707-320B, but that's because all engine variants have the same data and price.
