What was the first operational jet engine to use a control system containing semiconductors? This would include analog systems as well as digital ones. I am assuming that analog ones came first.
This would have to be a component used for normal operation of the engine, it would not include any equipment used for maintenance or diagnostic of the engine while on the ground.
Additionally it would have to be an aviation jet engine actually installed in aircraft that flew. Not just an engine used for R & D purposes on the ground.