Flap Pawl spring
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
Flap Pawl spring
First annual on the 170A. Found that the flap pawl springs are missing on both the right and left side of plane. It appears that this is needed to prevent flaps from moving (gust lock) while in the upright position. My question is this, Have they been removed for a reason or should I replace them both. I use manual gust locks every time I fly between the flaps and ailerons. 170A IPC Page 19, Fig. 11-10 Part # 0523227. If needed, parts location ? Thanks
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Re: Flap Pawl spring
Air Repair cost each as of 2/4/20 is $73.72! Has anyone found a different source?
Ty Richter
1712D
1712D
- Bruce Fenstermacher
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Re: Flap Pawl spring
BTW the pawl only assists the flap to stay locked in the up position. Any tail wind while the plane is stationary on the ground will overcome the pawl and your flap will slam full on and back to neutral. In a pinch place the flaps full on to hold them or install a gust lock.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
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Re: Flap Pawl spring
Thanks Bruce,
Does that make the purpose of the pawl to more for backup if a flap retract spring breaks? I had envisioned the pawl and spring combo to be for keeping the flaps from "flapping" with a tailwind. I learned something today!
Does that make the purpose of the pawl to more for backup if a flap retract spring breaks? I had envisioned the pawl and spring combo to be for keeping the flaps from "flapping" with a tailwind. I learned something today!
Ty Richter
1712D
1712D
- MoonlightVFR
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Re: Flap Pawl spring
What does this part Look LIke?
How can I tell if mine are missing?
How can I tell if mine are missing?
gradyb, '54 B N2890C
- ghostflyer
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Re: Flap Pawl spring
If it’s the springs that go from the flap to the interior of wing and hold the flaps in the trail position and on the flap stops well mine came from “aero Home Depot “ at the staggering price of 73 cents . I bought 2 of them . That was over 6 years ago and still going strong after many inspections including “SIDS” and flying hours .
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Re: Flap Pawl spring
They are small springs that are attached to the linkage against the fuselage. Only found on the earlier models with hinged flaps.
Ty Richter
1712D
1712D
- Bruce Fenstermacher
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Re: Flap Pawl spring
Grady, yours ARE missing. I can tell from here.MoonlightVFR wrote:What does this part Look LIke?
How can I tell if mine are missing?
They didn't use this part on the '54 you own. Only the A model.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
- Bruce Fenstermacher
- Posts: 10320
- Joined: Tue Apr 23, 2002 11:24 am
Re: Flap Pawl spring
No. With out the spring the flap will not retract to neutral while not in flight. . The spring alone can not hold the flap when a gust from the back hits it. The paw is suppose to hold the flap locked in but on even the best examples it can not overcome a good tail wind gust.prairiechicken wrote:Thanks Bruce,
Does that make the purpose of the pawl to more for backup if a flap retract spring breaks? I had envisioned the pawl and spring combo to be for keeping the flaps from "flapping" with a tailwind. I learned something today!
Should your spring break while in flight, your flaps will retract due to air pressure pushing them up as you release the flap handle and there is no longer a cable holding them down.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
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- Posts: 32
- Joined: Sun Sep 03, 2017 8:38 am
Re: Flap Pawl spring
No. With out the spring the flap will not retract to neutral while not in flight. . The spring alone can not hold the flap when a gust from the back hits it. The paw is suppose to hold the flap locked in but on even the best examples it can not overcome a good tail wind.
Yes, I have experienced a tail wind slapping my flaps around while taxiing on a gusty day. I had imagined that the pawl system would help that a little, doesn't sound like it does.
Ty Richter
1712D
1712D
Re: Flap Pawl spring
Can anyone post a link do them I need two
- ghostflyer
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Re: Flap Pawl spring
Bruce,
I am having trouble following your last entry. I thought it was about the pawl springs in the flap mechanism and not in the tail wheel. I am just confused.
I am having trouble following your last entry. I thought it was about the pawl springs in the flap mechanism and not in the tail wheel. I am just confused.