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How to remove rudder pedal arms?

ABS Full Member
Posts: 4

We're doing the annual inspection and the IA doesn't like the slop in the pilot rudder pedal pivots where the pedal attaches to the pedal arm, so our B95 is AOG. I've removed the pedals and see that only the holes in the pedal arm are worn; those in the pedals are perfect. The holes have no bushings so the AN3 pivot bolts wear the aluminum arm holes instead. The arms appear very difficult to remove since the pedal shafts also hold parts for nose wheel steering and retraction systems with generally poor access to fasteners. The parts diagram is only partly helpful and there is no guidance whatsoever from either Travel Air or Baron shop manuals about this. Do you have any guidance for this removal or repair?

Model: Travel Air B95
Posted 6/6/2019 - 1 year ago
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ABS Full Member
Posts: 299

Many years ago (early 1989) my airplane displayed the need to tighten up the brake pedals and the rudder pedal arms on the shaft that they are mounted on. Doing the brake pedals was fairly easy whereas the rudder pedal arms are a lot more work. I had articles in the Nov. 1989 and the April 1990 issues of the ABS Magazine regarding the fix for worn parts and pieces of the rudder pedal system. I believe the system is common for the Bonanza and Baron airplanes or at least very, very similar to all. The right rudder pedal can become disconnected from the pedal arm if the wear in the arm pivot is enough. Having that happen during a takeoff could be a bad situation if the pilot finds the right rudder pedal goes all the way to the floor and is not hooked to any part of the rudder control system.

Look in the Magazine archives and click on "go to issue." Then click on "Currents" on the index page and the article will come up. The 1989 article is on page 2387 and the 1990 page 2485. Any airplane with over 3000 hours probably has enough wear in those pedals to need a close inspection and possible repair as discussed in the articles.

At the moment my airplane has 7000+ hours and those pedals are still tight as a bull's ass in fly time thanks to the bronze and steel bushings used to make the repair.

Regards, Lew Gage

Posted 6/8/2019 - 1 year ago
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Approved by Bob Ripley
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ABS Full Member
Posts: 4

Thanks so much for your answers Lew, the pedal pivot bushing repair was exactly what I though I might do, but my IA is concerned about the repair being significant enough to need a 337 and perhaps some engineering signoff. Was your repair covered with a logbook entry or something more complicated? As for the difficult pedal arm removal noted in the 1990 article, can you describe the actual removal and installation process? I have no idea what the procedure would be since access is so restricted, there is no published shop manual coverage and there is no obvious way to remove the arm support shafts from the airplane.

Posted 6/11/2019 - 1 year ago
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ABS Full Member
Posts: 299

Well, I cut some of the floor support structure in order to get the shaft out. All spliced back with approved methods. I had to get a serviceable shaft since the original was worn quite a bit undersize. I bushed/rebushed everything that was worn so it was all close fits but operated smoothly. I used steel bushings for the pivots of the brake pedals and bronze for the pedal arms that ride on the pedal shaft. It is not an easy job and one must have some machine work capability. The articles have some details but it takes a mechanic with experience in repair work, not just bolting on new parts in an easy to get to place. But that right pedal needs to be brought back to new condition or it may disengage from the pedal arm. I think I filed a 337 for the work since it was a rather major repair. At least it was with all of the things I did to complete the job. If things are not badly worn your airplane may be a simpler to make right.

Regards, Lew Gage

Posted 6/11/2019 - 1 year ago
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ABS Full Member
Posts: 4

Thanks again Lew! Thankfully our pedal arms move properly on the support shafts without much play so I don't foresee a need to rework or replace the main pedal arms yet, but I always like to have such info available in my maintenance library. I expect we'll do the bushing repair for the pedal pivot holes up in the ears on the pedal arms; that is fairly straightforward and a good repair for longevity as well.

Posted 6/11/2019 - 1 year ago
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ABS Full Member
Posts: 299

I used heat treated grade 8 bolt stock to make the bushings for the brake pedals to pivot on. Of course you must have a lathe and some adjustable reamers to get a nice fit of everything and a long drill bit (1/4 inch should do) to drill from one side of the pedal to the other so the resultant holes "look at each other."

Regards, Lew Gage

Posted 6/14/2019 - 1 year ago
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How to remove rudder pedal arms?