170A flap linkage movement video

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AWilson
Posts: 85
Joined: Mon Jun 05, 2023 10:13 am

170A flap linkage movement video

Post by AWilson »

Below is a video showing the movement of my flap linkage. I am lifting the flap slightly up and down. You can see slop in the bolt attach points. Seems like the holes are out of round. Unless this is supposed to be like this. Please let me know your thoughts.

Is it slop/wear?
Is it a safety issue?
Are parts available if I need to resolve it?
Has anyone repaired or modified this in the past? If so I would love to hear what approach you took.
Am I being too picky as this is common place?

https://youtube.com/shorts/EtBl-OlkcA0? ... HznV-zbvXs

Let me know if the link doesn't work.

I appreciate any info you can provide.
49 A model, serial 18963
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n2582d
Posts: 3006
Joined: Mon Apr 29, 2002 4:58 am

Re: 170A flap linkage movement video

Post by n2582d »

Alan,
The slop on the bellcrank (p/n 0523224) where the link assembly is attached seems excessive to me. If your A&P determines that there is not enough material on the bellcrank to press a bushing in, you can buy a used or NOS bellcrank from Preferred Air Parts.
Gary
c170b53
Posts: 2560
Joined: Mon Apr 22, 2002 8:01 pm

Re: 170A flap linkage movement video

Post by c170b53 »

Definitely take the attach points apart as you can see a bit of bolt rotation, likely meaning there’s some wear into the bolt shank. Replacing the bolts might get you some time (depending on the hole health, remaining material) to source a sector if needed and have planned downtime for permanent fix.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
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GAHorn
Posts: 21281
Joined: Fri Apr 12, 2002 8:45 pm

Re: 170A flap linkage movement video

Post by GAHorn »

Yep…definitely too much “slop”. Removing this bellcrank for use as a stencil and duplicating it yourself using the same type material would qualify as an “owner produced part”. :wink:
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons. ;)
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AWilson
Posts: 85
Joined: Mon Jun 05, 2023 10:13 am

Re: 170A flap linkage movement video

Post by AWilson »

Thanks all. I will get it right.
49 A model, serial 18963
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