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 | 13:48
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777Supremecist
 
Joined: Apr 2025
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From: Milky Way Galaxy
Originally Posted by Vessbot
So if one jams, you don't have a trim runaway
I think this is a safety issue with the A300 trim switch. if, for some reason, the entire trim switch gets jammed in one position. Wouldn’t that cause a trim runaway? What sort of safety measures did the Airbus engineers put out for that situation?

Maybe a button in each yoke that deactivates the entire trim switch for thar particular yoke to prevent a trim runaway? That would kinda defeat the ergonomic purpose for it, creating a solution for a solution.

If I was the designer, I would put 2 electric-trim cutoff knobs on each side of the cockpit in case it gets stuck. The pilots would resort to using the trim wheels
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