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NDT of the 3 bolt holes, $400. Dye penetrant of the rear spar, $1400. P models do not need any spar inspection until like 9000 hours. Stronger spars, not so severely affected by the AD.
The biggest charge is labor. If there is a hole on the top of the wing, they can get to the nuts without removing the tanks. To do the dyepenetrant, they have to remove the top of the wing.
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