Originally Posted by
DaveReidUK
Is that true ?
No it isn't, I did not research and relied on friends stories and assumptions, will do better next time.
I do have a similar example though:
DC-9-11/87, MD88, MD90, B717-200 are all the same type, and I can't find more than a few switches shared in the cockpit between the B717 and the DC9. It would require more training I guess, but I know a TWA B717 pilot who after the AA merger got assigned the DC9, and was basically told "you are current in the type, so after indoc, straight to IOE", luckily they realized that wouldn't work.
https://registry.faa.gov/TypeRatings/