The International Cessna^® 170 Association

Good Evening Everyone,

I have a question although I'm on the road and don't have my parts manual in front of me. OK the question...

I'm trying to ensure proper rigging on the rudder and I previously supplied my mechanic with part numbers for the turnbuckles and end fittings. When viewed and checked they are not the same length (about 1 1/2" diff.). Well, he called today and after checking his micro-fiche copy he mentioned the lengths look like they are not supposed to be the same length . Problem is that with the rudder centered, two new rudder springs installed, and with proper tension - we can't get the pedals to even up ????

I'm sure the collective body must have the answer - I hope

Thanks in advance,

Kyle

Kyle,
The Turnbuckle forks are supposed to be two different lengths their part numbers AN165-22S and AN165-22L are identical except for the S and L which denotes short and long. It has been awhile but I recall making a small adjustment in the length of the Link Plates (#0310219-2) on the right side rudder bellcrank. Or perhaps the problem you are having lies with a part of your message that mentions proper tension, the rudder control cables are an open loop (as opposed to closed loop ala: Flaps, Elevator and Ailerons) and do not have a tension setting but rather are adjusted until you achieve a centered rudder with an even rudder pedal setting.

Sounds like something is mixed up either the the rudder springs (return springs to the firewall) or the clevis ends, when the right combination is put together it should take 15 mins to adjust. I often look at the condition of the pedals , whether they line up together and are straight in the vertical plane when briefly evaluating the state of maintenance of a plane.

The A model manual is messed up. Shows the long one on the right side (item 10). The long goes on the left. The B model manual is correct.

John,

Thanks for the reply - I'll check the link plates and have another look when I get back. Not sure how I posted to this area - no wonder I couldn't find the thing when I checked back. What is the reason for the different lenghts on the clevis ends?

Thanks... Kyle

If you are confused finding this topic elsewhere don't be. I moved this topic out of the TradeMart to The Hanger.

Kyle wrote:John,

Thanks for the reply - I'll check the link plates and have another look when I get back. Not sure how I posted to this area - no wonder I couldn't find the thing when I checked back. What is the reason for the different lenghts on the clevis ends?

Thanks... Kyle

Kyle,
My thought (translation W-A-G ) as to the different length clevis ends is that Cessna wanted to use equal length Rudder Cables (same part number both left and right Rudder Cable) and the easiest way to compensate for the difference in lengths used up in routing the cables was to use unequal length clevis ends.

Bruce,

Thanks for moving to the proper spot! After I get back I'll let you guys know what we find...
Thanks again for the tips.

Regards - Kyle