1949 170A flaps

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1949 170A flaps

Postby Dferr34 » Mon Mar 27, 2023 10:26 pm

I've recently purchased a 1949 Cessna 170A. A friend of mine also has a 1949. His flaps lock in the up position mine do not. if the wind is blowing from behind it will blow then down and they will spring back up, is something wrong with my flaps?

Thanks, Don
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Re: 1949 170A flaps

Postby Dferr34 » Mon Mar 27, 2023 10:58 pm

Okay, I've read through some older posts, I see what's going on. just a bad design.
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Re: 1949 170A flaps

Postby jklaerner » Tue Mar 28, 2023 1:31 am

Dferr34 wrote:I've recently purchased a 1949 Cessna 170A. A friend of mine also has a 1949. His flaps lock in the up position mine do not. if the wind is blowing from behind it will blow then down and they will spring back up, is something wrong with my flaps?

Thanks, Don

My ‘51 A model was the same way when I bought it. There are adjustable tabs and small spring loaded latches that act as up-locks and disengage at the slightest pull of the flap bar from inside, but work to protect from flapping in a tailwind when parked. After some adjustment, mine now work like new. They are located at the inboard side of the flap by the actuator arm through an access panel on the top side of the wing.
John Klaerner
51’ C-170-A N1292D
KCVB
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Re: 1949 170A flaps

Postby GAHorn » Tue Mar 28, 2023 1:40 am

Many owners of 170/170A aircraft deploy full flaps to prevent damage from tailwinds, prop-blasts, helicopters, etc when tied down.
'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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Re: 1949 170A flaps

Postby Dferr34 » Mon Apr 03, 2023 9:31 am

I checked out my flaps and found the J shaped bracket with the two holes that bolts to the side is missing on both sides. is this a part I can still find? Or would it have to be fabricated by an A&P mechanic? Thanks, Don
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Re: 1949 170A flaps

Postby Bruce Fenstermacher » Mon Apr 03, 2023 1:34 pm

A part must be made using an approved method. One of those methods is an Owner Produced Part. An A&P can't just make a part. You could have your A&P make a part so long as you comply with the Owner Produced Part algorithm.

Here is a thread on the topic of Owner Produced Parts. viewtopic.php?f=43&t=2567&hilit=Owner+produced
CAUTION - My forum posts may be worth what you paid for them!

Bruce Fenstermacher, Past President, TIC170A
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N7A '49 170A -More original than most making folks GREEN with envy
N42532 '45 J-3 Clipped Wing Cub
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Re: 1949 170A flaps

Postby GAHorn » Mon Apr 03, 2023 3:04 pm

Dferr34 wrote:I checked out my flaps and found the J shaped bracket with the two holes that bolts to the side is missing on both sides. is this a part I can still find? Or would it have to be fabricated by an A&P mechanic? Thanks, Don


(Bruces exacting, absolutely-correct, legaleazed answer is translated to: Yes, your A&P can make this part for you under your authority as Owner. ) :wink:

You will have to provide the pattern, or specifications, or a part to reverse-engineer to your A&P and a written request to him to dot the I and cross the T.
'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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Re: 1949 170A flaps

Postby Dferr34 » Mon Apr 03, 2023 8:36 pm

Does anyone Know of a place to find these parts used?
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Re: 1949 170A flaps

Postby voorheesh » Tue Apr 04, 2023 2:02 am

You might try Del-Air in Porterville, CA. Haven’t been by there in a while but they had a large inventory of older Cessna parts and possibly could assist in fabricating a replacement. Also T&M Aviation in Ukiah, CA might be a resource. If my memory serves they offered service and recovering Cessna flight controls. I’m sure the association discussions on owner produced parts are excellent and here’s another useful link.

https://resources.savvyaviation.com/wp- ... -parts.pdf
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