Annual Coronary

Jay Honeck wrote:
The junior A&P in the shop that is doing my annual (whom I've known for
Peering up into the hole, he showed me what looked like massive corrosion on
the wing spar -- a sometimes fatal malady, not unknown to Cherokees. Two
years ago a good friend had to replace BOTH wings on his Cherokee 140, and
his plane was down for almost a year, precisely for this problem.
His advice: Poke at it, to see if it's not left-over paint stripper from
the last paint job. This nearly inaccessible joint is a common place for
stripper to accumulate, because it's almost impossible to remove during the
pre-paint job pressure wash.
So, we fashioned a long, sharp scraper from some scrap aluminum, and I held
my breath as he began to poke away at it...
It easily flaked off into little chunks of "melted" paint. The metal
underneath was perfectly clean -- and completely unblemished.

Yea. My A&P found a similar area several years ago. I can't remember
what he did to clean it, but I do remember him dowsing it with one of the
corrosion sprays (ACF-50 or Corrorsion-X or something) after he was done
cleaning it. You might want to do the same thing "just in case". It
couldn't hurt.

--- Jay

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