B747 and B767 P&W Engine Swap
The P&W engines on the B747 and B767 were not interchangeable. They were like chalk and cheese. 747 has cable driven air operated fan reversers, 767 was hydraulic with screwjacks. Cowlings different on both types, 767 was of the FADEC thrust era wheras the 747 was manual. Instructor told us that the engine overhaul shop found only seven parts that were interchangeable between the engine models.