"Drooping" left rudder pedal

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vindio
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"Drooping" left rudder pedal

Post by vindio »

Happy new year all!

'47 C120

Just noticed that our left rudder pedals drop down to the floor, in the "neutral rudder" position.
IMG_20241231_072434106.jpg
IMG_20241231_072434106.jpg (97.65 KiB) Viewed 2253 times
Rudder actuation seems unaffected. Is there some sort of spring/actuator that returns both pedals to neutral?

We've owned the aircraft for a year, but not 100% sure if that's how it's always been (just noticed it recently).

Safety issue (ground the airplane now), or cosmetic (can wait till next time in the shop)?

Thanks!
6298
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Re: "Drooping" left rudder pedal

Post by 6298 »

There are two springs under that center cover, near the firewall. The one on the left is either broken or disconnected.
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
Overhaul small Continentals
vindio
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Re: "Drooping" left rudder pedal

Post by vindio »

6298 wrote: Tue Dec 31, 2024 7:58 am There are two springs under that center cover, near the firewall. The one on the left is either broken or disconnected.
Thanks Randy ... I'll see if I can pop that cover off and take a closer look. Curious: do those springs affect the actual operation of the rudder?
6183
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Re: "Drooping" left rudder pedal

Post by 6183 »

6298 wrote: Tue Dec 31, 2024 7:58 am There are two springs under that center cover, near the firewall. The one on the left is either broken or disconnected.
;)
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6597
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Re: "Drooping" left rudder pedal

Post by 6597 »

These....
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rudderpedals.jpg
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6298
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Re: "Drooping" left rudder pedal

Post by 6298 »

I almost took a picture, but Dave beat me to it. Thanks!
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
Overhaul small Continentals
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6643
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Re: "Drooping" left rudder pedal

Post by 6643 »

The springs are different lengths because the pedals are mounted in different places. If they're reversed, or if they are the same length, the pedals won't center properly.

When you center the pedals, is the rudder centered?

Hi, Randy! Long time no hear!
vindio
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Re: "Drooping" left rudder pedal

Post by vindio »

Thank you all ... great information!

After taking the cover off, we saw that the right spring (left rudder pedals) had indeed, snapped, and dettached. We're having it replaced.

Johh ... to your question: if you center the pedals, the rudder is, indeed, centered properly, so no issue there.

Happy new year!
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6643
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Re: "Drooping" left rudder pedal

Post by 6643 »

rudder_springs_135.jpg
rudder_springs_135.jpg (62.61 KiB) Viewed 2190 times
-1 is left, -2 is right.
vindio
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Re: "Drooping" left rudder pedal

Post by vindio »

6643 wrote: Tue Dec 31, 2024 6:41 pm rudder_springs_135.jpg

-1 is left, -2 is right.
Yup ... -2 on order! Lucky for us, it's the cheaper one :-)
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