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Why do cockpit seats on the A220 have a cutout on the bottom cushion? The answers to Aircraft pilot's seats: what is the notch for? explain that these cutouts allow for easier maneuverability of the yoke. However, this A220 cockpit has no yoke. Why does this cockpit have the cutout?

enter image description here
(source: thepointsguy.com)

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As we have seen in a previous question, the A220 is a re-branded Bombardier CSeries.

The CSeries started flying in 2013. At the time Bombardier's other commercial jet was the CRJ, that started flying in 1999, 14 years prior.

CRJs do have a yoke:

enter image description here
(wikimedia.org)

If you look closely, you'll notice that the seats look identical, indicating that Bombardier probably decided to cut on costs by simply re-using something they had already (and minimizing the parts they would have to support).

Moreover, this answer mentions the need to have the straps as close to the pilot as possible, and this is achieved with the notch. A redesign of the seats has probably been deemed not worthy of the costs.

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