up date on 9712T

Tom-D

Tom-D

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Feb 23, 2005
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Tom-D
It took all day yesterday to get the Rudder pedals out so I could repair the corrosion found under them.
picture on what was found
 

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Just a guess those holes aren't supposed to be oval shaped?
 
A proper repair is preferred as far as I am concerned. I am glad you are working to restore a C-150 that has seen better days.
 
Tom-D said:
230.00 each? when I'm trying to make a profit ? when I can repair them at no cost but my time. :)
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Well, they were discounted to $120 apiece. What is your time worth? How much time does it take to fix what you have?

I agree in your case you are probably better off fixing what you have rather than buying new.
 
Greg Bockelman said:
Well, they were discounted to $120 apiece. What is your time worth? How much time does it take to fix what you have?

I agree in your case you are probably better off fixing what you have rather than buying new.
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That is still $480.00 for 4 ?
 
I guess Tom has his ducks in a row here. Even though $120 per piece (or $480 total) isn't much by airplane standards, those $500's add up and if you're trying to flip the plane for profit, those $500's quickly make the plane cost more than market will pay for it.
 
Tom-D said:
230.00 each? when I'm trying to make a profit ? when I can repair them at no cost but my time. :)
Click to expand...

If you can fix all four of them for less than $480, then that's the route to go.
 
mtuomi said:
I guess Tom has his ducks in a row here. Even though $120 per piece (or $480 total) isn't much by airplane standards, those $500's add up and if you're trying to flip the plane for profit, those $500's quickly make the plane cost more than market will pay for it.
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What he said :)

And remember I bought this 150 for a project to work on in my spare time, which is basically worth nothing unless I can make it worth something.
 
How are you going to fix them, Tom?

There might be a core return on these, if they are rebuild-able.
 
From a non-aviation mechanic:

As to the corrosion, is that an issue for those pieces? And if so, why?

As for the hole elongation, what is the proper aviation repair?
 
The repair will depend upon the hole size, the smaller ones will be reamed over size and a steel bushing swaged in, but that huge one may require welding closed and the hole re-drilled. these are not heat treated, We will see what happens when we try to weld them.
 
455 Bravo Uniform said:
From a non-aviation mechanic:

As to the corrosion, is that an issue for those pieces? And if so, why?
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This 150 was stored with out any preservation and sat from 1987 to last month. no it is not typical.
The hole wear is pretty typical for the age plus 6k hours usage, the worst hole was on the right side left pedal, I think it just sat there and vibrated.
 
Thanks Tom. My corrosion question was not whether it was normal or not, but instead, is it a safety problem if you just left the corrosion as-is?
 
Tom-D said:
The repair will depend upon the hole size, the smaller ones will be reamed over size and a steel bushing swaged in, but that huge one may require welding closed and the hole re-drilled. these are not heat treated, We will see what happens when we try to weld them.
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You know magnesium is the worst metal possible to subject to dissimilar metals contact, right? Welding it, that should be fun.
 
GlennAB1 said:
You know magnesium is the worst metal possible to subject to dissimilar metals contact, right? Welding it, that should be fun.
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I'll ask again, why do you believe these are mag?
 
455 Bravo Uniform said:
Thanks Tom. My corrosion question was not whether it was normal or not, but instead, is it a safety problem if you just left the corrosion as-is?
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Corrosion on the cast pedals is not a problem, it was removed and treated and will not be a hazard in the future, it was minor surface. and I'll have better pictures later.
The corrosion on the sheet aluminum stock is a problem, So the sheet stock will be replaced. so far that's both baggage compartment floors and now some or all the boot cowl lower panels.
 
GlennAB1 said:
30 years of inspecting aircraft, I've seen magnesium and other metals corrosion a zillion times...
Read this, I'll be your holes are worn beyond these limits:
http://www.skygeek.com/cessna-0760678-2-rudder-pedal.html
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OH ,, So you can tell by pictures what the alloy is.. GET real.

What happens when you apply Alodine 1200 to Mag alloys?

Who would be required to read any thing to know that?

another internet expert, are we?
 
I remember doing this on my aircraft.

From link above:

Exchange your pedals before they are worn beyond repairable limits! You may send us your used rudder pedal cores at any time for core credit consideration. The following guidelines will be used to determine core value:
  • Max large pivot hole diameter < 0.490 inches
  • Max small brake pivot hole diameter < 0.275 inches
  • Pedals worn beyond these limits are not eligible for core credit. Always check the hole size at the point of maximum diameter. The inside face of the magnesium casting around the hole may have wear over a much larger area than the diameter of the hole due to pedal action. This face wear, if minor, may be ignored when measuring the hole diameter.

    Re-bushed rudder pedals - Part numbers 0760678-1, 0760678-2 and 1460320-1
  • FAA approved repair for magnesium rudder pedals
  • Worn and elongated pedal holes are reamed and fitted with bushings for a longer life
  • Bronze bushings resist vibration and corrosion wear longer than the magnesium casting
  • Fits most single engine Cessna from 1963-1981, except for model 188
 
JAWS said:
I remember doing this on my aircraft.

From link above:

Exchange your pedals before they are worn beyond repairable limits! You may send us your used rudder pedal cores at any time for core credit consideration. The following guidelines will be used to determine core value:
  • Max large pivot hole diameter < 0.490 inches
  • Max small brake pivot hole diameter < 0.275 inches
  • Pedals worn beyond these limits are not eligible for core credit. Always check the hole size at the point of maximum diameter. The inside face of the magnesium casting around the hole may have wear over a much larger area than the diameter of the hole due to pedal action. This face wear, if minor, may be ignored when measuring the hole diameter.

    Re-bushed rudder pedals - Part numbers 0760678-1, 0760678-2 and 1460320-1
  • FAA approved repair for magnesium rudder pedals
  • Worn and elongated pedal holes are reamed and fitted with bushings for a longer life
  • Bronze bushings resist vibration and corrosion wear longer than the magnesium casting
  • Fits most single engine Cessna from 1963-1981, except for model 188
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Way too late to use these as core.
 
Tom-D said:
OH ,, So you can tell by pictures what the alloy is.. GET real.
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The corrosion exhibited on your rudder pedal looks exactly like corrosion I've found on magnesium, numerous times. It doesn't look like aluminum corrosion, I've seen that numerous times also. Boeing 727's had magnesium and aluminum all over them, in heavy check we found corrosion all the time.
 
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