PPRuNe Forums - View Single Post - Why does the Airbus A300/310 series only have 1 trim switch per yoke instead of 2?
Old 20th January 2026 | 13:37
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777Supremecist
 
Joined: Apr 2025
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From: Milky Way Galaxy
Originally Posted by Uplinker
Yes. That was answered in post#2:



my bold.

So if one trim switch under the larger rocker becomes faulty; both trim switches will be disregarded on that yoke. The next thing that will happen is: "You have control", (or maybe use manual pitch trim via the trim wheel, but I don't know if A300 has physical trim wheels ?).

One large switch rocker is easier to operate than two smaller ones that have to be pushed together.

Yea but how would the computer understand that it’s the rocker that’s stuck and not the pilot that’s putting the trim input?

Also, the A300 does have trim wheels. Tho I do think it wouldn’t really be a problem even if it didn’t, most planes that don’t have trim wheels do have an emergency pair of electric trim switches in the middle just in case. I do wonder why didn’t use this design in any other planes tho. It seems more efficient to just have 1 trim button on the yoke, and use the wheels/emergency trim switches only in the case of an emergency


Last edited by 777Supremecist; 20th January 2026 at 13:57.
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