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If you mean removal of the wings from the fuselage (not just the extensions), then the number I saw during the early work on the SIDs is 200 man hours, which translates to $15,000 at $75 per man hour. Additional work since then may have narrowed this number further (up or down), so perhaps others will jump in here with more current estimates.
This high cost, along with the opinion of many that a wing failure would not occur at its attachment with the fuselage, explains SOAPA's resistance to the wing-fuselage attachment SID.
To cite an expert, here's the gist of one structural expert with Skymaster knowledge told me about the wing (excerpted from my post of 2/24 on the SID thread):
"If fatigue-tested to failure, no one knows where it will fail. Cessna doesn't know and I don't know. But I know that the wing-fuselage attach points are the least likely to fail. If I had to guess it would be just outboard of the strut, or perhaps the strut itself, but not at the wing-strut attach point but further down."
He dismissed a failure at the wing-fuselage attach points because of the massive over-design and because the front attachment, which carries the heavier load, is in compression in flight, meaning that the wing is pushing down on the top of the fuselage, rather than trying to pull up (i.e., separate) from the fuselage.
Ernie
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