Specifically the 737 and 757 are based on very old designs.
Specifically the 737 and 757 are based on very old designs.
With respect to type ratings, Airbus shares type ratings between the 330, 340, and 350, but the 340 is basically gone (few operators), and the 320 (their most numerous airframe) is a different type. Boeing has common type ratings for the 777 and 787, as well as for the 757 and 767.
It's A330/A330Neo together, but A340 and A350 separately, 3 separate types
757/767 but 777 and 787 separately
(And 747 and 747-4/8 are separate as well)
https://www.airbus.com/newsroom/news/en/2014/10/the-common-t...
FAA (and maybe EASA) takes it as 2 types but it only requires a difference training from the 330->350.
From the link: The new regulatory approval means that pilots who are qualified and current on the A330 can already commence their preparations to take the A350 XWB’s controls by undergoing “differences training” only
Based on https://www.pprune.org/tech-log/609896-sff-a330-a350.html
The interim airliner would be an enhanced 767, that is still in production (although not as a passenger aircraft).