John Bombard wrote: > > Ed, in your response you mentioned doing the ice-pick check on the push > rods early in the annual. Would you please explain what that means, i've > never heard that term before. I just had an annual done, maybe it's > something I should have done. Thank you, > > Jack Bombard > N94600 >
I have seen the push-rod tubes rust from the inside out. You can't tell this by looking at the tube. We were advised nine or 10 years ago to use an ice pick to poke at the push-rod tubes to see if it would go through. These tubes are sufficiently thick that medium pressure on the ice-pick shouldn't damage the tube. Shortly after being advised of this, at my owner-assisted annual, one of my aileron push-rods failed this test. I dug in my car and papers till I found Skyport's phone number and ordered a new one overnighted to me. I still had the tube till recently. It looks and feels fine on the outside. Inside, the lower part of the low end of the tube was corroded almost out to the surface. There was some discussion way back then about putting some oil (a special kind) inside the push-rods before sealing them. About that, I'm not at all capable of giving meaningful suggestions. -- Ed Burkhead Peoria, Ill. N3802H
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