08 May 2025, 22:06 [ UTC - 5; DST ]
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Post subject: 2004 Cessna 206 Wing Rock  Posted: 06 Aug 2020, 15:09 |
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Joined: 07/07/09
Posts: 124
Post Likes: +15
Company: NAc
Aircraft: BE36
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Have been flying a 2004 Cessna 206H with Gamin 1000 and KAP 140 A/P. In still air the A/P works very well in all modes. As soon as the aircraft experiences a little turbulence the A/P rocks the wings Left and Right in small movements like it is chasing the track. it does settle after a time but starts again at any sign of turbulence. This happens in all modes including Roll. If you resist it a little it seems to settle quicker. Avionics have check just about everything and still not come up with an acceptable solution
Any bright ideas from Anyone.
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Post subject: Re: 2004 Cessna 206 Wing Rock Posted: 06 Aug 2020, 16:19 |
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Joined: 12/04/09
Posts: 1132
Post Likes: +418
Location: phoenix, AZ (KDVT)
Aircraft: 1968 Bonanza V35A
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Bob Weber at http://www.webairconsulting.com. I’ve seen him referred to as an autopilot guru here on BT. I have no personal experience with him but other members have.
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Post subject: Re: 2004 Cessna 206 Wing Rock Posted: 06 Aug 2020, 21:48 |
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Joined: 01/26/12
Posts: 738
Post Likes: +113
Location: Modesto, CA KMOD
Aircraft: Baron D-55 & J-3
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I don’t have any ideas, but I did have the same experience in a similar year C182. I put a video camera on the dash and when I played it back in a fast forward mode it was more obvious.
LB
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Post subject: Re: 2004 Cessna 206 Wing Rock Posted: 07 Aug 2020, 09:13 |
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Joined: 09/26/11
Posts: 12
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We had the same problem (putting pressure on yoke would stop the problem) on our T206H with same equipment, and avionics shop replaced roll servo. Fixed the wing rocking.
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Post subject: Re: 2004 Cessna 206 Wing Rock Posted: 07 Aug 2020, 09:20 |
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Joined: 08/08/16
Posts: 699
Post Likes: +222
Aircraft: A36 :-)
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Username Protected wrote: Have been flying a 2004 Cessna 206H with Gamin 1000 and KAP 140 A/P. In still air the A/P works very well in all modes. As soon as the aircraft experiences a little turbulence the A/P rocks the wings Left and Right in small movements like it is chasing the track. it does settle after a time but starts again at any sign of turbulence. This happens in all modes including Roll. If you resist it a little it seems to settle quicker. Avionics have check just about everything and still not come up with an acceptable solution
Any bright ideas from Anyone. Most probably a worn gear in the roll servo, quite common on old KAP140ies and cured easily.
_________________
'Speak your mind even if you are a minority of one, the truth is still the truth.'
Mahatma Gandhi
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